Relevant bibliographies by topics / Corrosion removal

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Corrosion removal'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 March 2023

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Journal articles on the topic "Corrosion removal"

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Freeman, Garth B., Robert DeMott, Thomas Gauthier, Michael Stevenson, and Jim Hubbard. "Continued Corrosion After Removal of Corrosive Drywall." Journal of Failure Analysis and Prevention 11, no. 3 (January 6, 2011): 265–73. http://dx.doi.org/10.1007/s11668-010-9427-7.

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Gobara, Mohammed. "Using Electrochemical Noise Technique to Evaluate the Corrosion Performance of a Reinforcement Magnesium Alloy." International Letters of Chemistry, Physics and Astronomy 40 (October 2014): 61–72. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.40.61.

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AZ91D magnesium alloy was reinforced by titanium and boron carbides under an inert environment using in-situ reactive infiltration technique. The corrosion properties of the reinforced magnesium alloy were investigated using Electrochemical noise (EN) techniques in dilute Harrison solutions. The moving average removal (MAR) method was used as trend removal methods. The frequency of pitting events (ƒn) and the average charge in each pitting events (q) were calculated for each EN measurements. EN results shows that the addition of reinforcement improved the corrosion resistance of the magnesium alloy (R-Mg) and no signs of corrosion were observed during 10 days of immersion in the corrosive solution.
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Gobara, Mohammed. "Using Electrochemical Noise Technique to Evaluate the Corrosion Performance of a Reinforcement Magnesium Alloy." International Letters of Chemistry, Physics and Astronomy 40 (October 23, 2014): 61–72. http://dx.doi.org/10.56431/p-95k16q.

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AZ91D magnesium alloy was reinforced by titanium and boron carbides under an inert environment using in-situ reactive infiltration technique. The corrosion properties of the reinforced magnesium alloy were investigated using Electrochemical noise (EN) techniques in dilute Harrison solutions. The moving average removal (MAR) method was used as trend removal methods. The frequency of pitting events (ƒn) and the average charge in each pitting events (q) were calculated for each EN measurements. EN results shows that the addition of reinforcement improved the corrosion resistance of the magnesium alloy (R-Mg) and no signs of corrosion were observed during 10 days of immersion in the corrosive solution.
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Švadlena, Jan, Tomáš Prošek, Kristýna Charlotte Strachotová, and Milan Kouřil. "Chemical Removal of Lead Corrosion Products." Materials 13, no. 24 (December 12, 2020): 5672. http://dx.doi.org/10.3390/ma13245672.

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Restoration treatment, specimen preparation or mass loss measurements on coupons made of lead require a reliable process of dissolution of corrosion products. In this study, several types of model corrosion products with compositions representative of those found on real objects were prepared and characterized. Ten solutions were then thoroughly tested in interval cleaning experiments, regarding the efficiency of removal of the corrosion products, corrosivity towards bare lead, and remnants left on the surface. The solution recommended in the current version of the ISO 8470 standard was found to be improper for the cleaning of both historical artefacts and corrosion coupons due to its inability to remove sulfide corrosion products and the risk of surface contamination and staining. A solution of 20% hydrochloric acid is the best choice for the preparation of lead coupons before exposure or for evaluation of mass loss of exposed samples because its somewhat higher corrosivity towards metallic lead is tolerable for these applications. Rochelle salt solution was found to be optimal for the cleaning of historical artefacts free of sulfide corrosion products due to the lowest corrosivity. None of these alternative solutions leave remnants on the surface and they are efficient at laboratory temperature.
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Sun, Jie, Wenxiang Zhao, Pei Yan, Kaijie Chen, Li Jiao, Tianyang Qiu, and Xibin Wang. "Effect of Corrosive Medium and Surface Defect-Energy on Corrosion Behavior of Rolled ZK61M Alloy." Materials 15, no. 12 (June 9, 2022): 4091. http://dx.doi.org/10.3390/ma15124091.

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Magnesium alloys have been widely used as lightweight engineering structural materials, but their service performances are severely restricted by corrosion failure. In this paper, the influence of corrosive medium and surface defect energy on the corrosion behavior of rolled ZK61M alloy was investigated. The corrosion tests were conducted in different concentrations of sodium chloride solution for different durations, and the polarization curves and electrochemical impedance spectroscopy were reported. The surface morphology of rolled ZK61M alloy before and after corrosion tests were analyzed. The results showed that the corrosion tendency became stronger with the increase of the concentration of corrosive medium and the number of surface defects of ZK61M alloy. Moreover, the initial corrosion pattern was the pitting caused by micro galvanic corrosion at the surface defect, which gradually developed into uniform corrosion. Furthermore, the main damage occurred at the grain boundary, resulting in the destruction of grain bonding force and the removal of material along the rheological layer. The oxidation corrosion mechanism was mainly the anodic dissolution mechanism.
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Verma, Chandrabhan, and Mumtaz A. Quraishi. "Sulfamic acid is an environment-friendly alternative electrolyte for industrial acid cleaning and corrosion inhibition: a mini review." Corrosion Reviews 40, no. 2 (February 3, 2022): 119–26. http://dx.doi.org/10.1515/corrrev-2021-0023.

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Abstract Sulfamic acid (H3NSO3), which is also known as amino sulfuric acid, sulfamidic acid, amidosulfonic acid, and aminosulfonic acid, is an industrially useful water-soluble colorless crystalline solid. Sulfamic acid solutions of different concentrations are widely used for the removal of scales and metal oxides deposits from the surface of metals and ceramics. Sulfamic acid solutions (5–10%) serve as alternative electrolytes for the removal of rusts and lime scales to replace relatively more irritating and volatile hydrochloric and sulfuric acid-based electrolytes. Sulfamic acid solutions can be regarded as relatively more environmentally friendly and less toxic electrolytes for the cleaning of metallic surfaces. However, similar to the popular acidic solutions, sulfamic acid based electrolytes are corrosive to metal and metallic structures. Therefore, organic compounds based corrosion inhibitors of natural and synthetic origin are widely used to prevent corrosive damage of metallic surfaces in such electrolytes. These compounds become effective by adsorbing on the metallic surface following through the Langmuir adsorption isotherm model. Using electrochemical analyses it was observed that organic corrosion inhibitors in sulfamic acid based electrolytes behave as mixed- and interface-type corrosion inhibitors and they become effective by adsorbing at the metal/electrolyte interfaces. The adsorption of most of the corrosion inhibitors mostly follows physiochemisorption mechanism.
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Kainuma, Shigenobu, Yuya Yamamoto, Hideyuki Hayashi, and Yoshihiro Ito. "Practical Method for Estimating Corrosion Depth of Uncoated Carbon Steel Using Thickness of the Corrosion-Product Layer." Key Engineering Materials 577-578 (September 2013): 201–4. http://dx.doi.org/10.4028/www.scientific.net/kem.577-578.201.

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The corrosion environments of individual parts of members in a steel structure vary significantly. Therefore, efficient maintenance requires accurately evaluating these environments and predicting corrosion damage over time. This research focused on comprehensively evaluating the corrosive environment of each part of members in the structures based on the mean corrosion depth of uncoated steel plates mounted on the members. Atmospheric exposure tests were conducted in four exposure fields in which the environments varied widely as a function of rainfall and airborne sea salt. Based on the test results, a practical method of estimating the mean corrosion depth using the thickness of the corrosion-product layer on the mounted plates that does not require removal of the corrosion product is proposed. Furthermore, a method for estimating the time-dependence of corrosion depth for parts of the members after deterioration of the paint coating is proposed.
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Barbosa, Lusinete Pereira, Olandir Vercino Correa, N. Karsokas Filho, and Isolda Costa. "Corrosion Characterization of AISI 304 Stainless Steel Filter." Materials Science Forum 930 (September 2018): 489–94. http://dx.doi.org/10.4028/www.scientific.net/msf.930.489.

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Pre-sintering for removal of lubricants is one of the most important steps in processing of powder metallurgy materials to achieve corrosion resistance. This is often the most neglected step in the sintering process. Incomplete removal of these organic compounds may result in sensitization of sintered parts. The aim of this study is to investigate the effect of lubricant removal process on the corrosion resistance of sintered AISI 304 L stainless steel filters. Pre-sintering was carried out at 450° C and sintering at 1150° C. As lubricant, 1% wax was used. The corrosion resistance of sintered samples was evaluated by polarization and tests, optical and scanning electron microscopy. The results showed that lubricant removal was not complete and during sintering sensitization of the stainless steel occurred decreasing the localized corrosion resistance of the stainless steel.
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Hodač, J., and Z. Fulín. "Impact of corrosion product removal to depth of corrosion damage in weldment joint." Koroze a ochrana materialu 63, no. 4 (December 1, 2019): 148–52. http://dx.doi.org/10.2478/kom-2019-0019.

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Abstract Corrosion flaws in pipelines can caused severe financial losses and also can be dangerous for people. One of the most frequently damaged parts are dissimilar pipe welds. We would like to understand how corrosion process reacts on corrosion product removal. Outputs from experiment will be used for production of test specimens. For testing we chose standard dissimilar weldment used in Czech power plants. It is joint with 08Ch18N10T and 22K (GOST) steel. Joint is cut to 24 same specimens. There are exposed to flowing water solution of 5% NaCl. Half of the specimens are regularly mechanically cleaned. The joint is metallographically observed and parts with and without corrosion products are compared. Water salt solution increased pH from 7,25 to 7,86 during 31 days test and conductivity varies around 74 mS cm−1. Metallographic observation indicates that corrosion under corrosion products layer is locally speed up and causes pitting corrosion. Cleaned specimens indicate plane corrosion with lower depth. These results indicate that slag in pipeline could locally speed up corrosion depth penetration. On the other hand, solutions with abrasive particles (which can wipe out the corrosion product) will probably facilitate plane corrosion damage on pipeline walls. This test brings us another knowledge, how to simulate realistic corrosion damage for production of NDT qualification test pieces.
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Marjanowski, Jan. "Leakages and Scaling in Stainless Steel Heat Exchangers." European Journal of Engineering Research and Science 4, no. 8 (August 8, 2019): 4–10. http://dx.doi.org/10.24018/ejers.2019.4.8.1424.

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The purpose of the article is to explain causes of non-corrosive and corrosive leaks in heat exchangers (HE) during standard exploitation as well as to present prevention measures to eliminate dangerous clogging by scaling and corrosion. The heat exchangers are made of Cr-Ni austenitic steels, belonging to the group of steels resistant to corrosion, called commonly stainless steels. The author of the article has over 40 years of practical experience in the areas of water treatment, corrosion and leaks prevention, as well as heat exchangers chemical cleaning. This part of the article focuses on various cases of heat exchanger leakages, while part two is a compendium on correct selection of technologies and chemicals for removal of scales from polluted heat exchangers. One will not find in the paper neither HE producer name nor industrial chemical cleaning formulas. The present paper describes reasons of leakages, examples of stainless steel HE corrosion and general characteristic of scales within HE.
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Dissertations / Theses on the topic "Corrosion removal"

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Collins, William D. "Chemical treatment of corroding steel reinforcement after removal of chloride contaminated concrete." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08182009-040410/.

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Chen, Grace. "Fiber adsorbents for tert-butyl mercaptan removal from pipeline grade natural gas." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52912.

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The purpose of this thesis study is to assess the feasibility of using a fiber sorbent module system to remove t-butyl mercaptan (TBM), a common odorant, from pipeline grade natural gas. Odorants such as mercaptans are added to natural gas for safety reasons, but their combustion products are corrosive and decrease the lifetime of the turbines in which they are combusted. Therefore, it is desirable to remove the odorants to extend this lifetime. A TBM removal system attached to a 840 MW natural gas-fueled combined cycle power plant unit such as the one at Plant McDonough-Atkinson (Smyrna, GA) must process gas at a flow rate of approximately 180,000 standard cubic feet per minute. A single 85 MW GE 7EAQ gas turbine has a flow rate of approximately 15,000 standard cubic feet per minute, and will serve as the basis for a system design and process analysis study. The concentration of odorants in natural gas is typically 10 ppm or less. For the purposes of this study, the upper limit of 10 ppm TBM will be used. Zeolite 13X was selected as the model adsorbent for this study due to its high sorption capacity for mercaptans and its ease of incorporation into both fibers and pellets. Design calculations were performed to optimize and determine the feasibility of fiber modules for TBM removal, as well as assess their advantages over conventional pellet packed beds. An understanding of how critical parameters such as heat and mass transfer resistances, pressure drop, and capital and operating costs are affected by design specifications such as sorbent and bed dimensions, allows an optimal design for the needs of the model turbine to be found. Based on these design equations, a fiber sorbent module configuration that selectively and continuously removes TBM from natural gas is developed
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Govindarajan, Rajkumar. "Oxidative Removal of Implanted Photoresists and Barrier Metals in Semiconductor Processing." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/217074.

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Chemical systems containing oxidants are widely used at various stages in semiconductor processing, particularly for wet cleaning and polishing applications. This dissertation presents a series of studies related to oxidative removal of materials in the Front-End-Of-Line (FEOL) and Chemical Mechanical Planarization (CMP) processes during IC fabrication. In the first part of this study, stripping of photoresists exposed to high dose of ions (1E16 As/cm²) was investigated in activated hydrogen peroxide systems. Stripping of photoresists (PR) exposed to high dose (>1E15/cm²) ion beams is one of the most challenging steps in FEOL processing. This is due to unreactive crust layer that forms on the resist surface during ion implantation. The use of hydrogen peroxide systems activated by metal ion or UV light, for disrupting crust formed on deep UV resist to enable complete removal of crust as well as underlying photoresist was investigated. A systematic evaluation of variables such as hydrogen peroxide and metal ion concentration, UV intensity, temperature and time was conducted and an optimal formulation capable of attacking the crust was developed. A two step process involving pretreatment with activated hydrogen peroxide solution, followed by treatment with sulfuric acid-hydrogen peroxide mixture (SPM) was developed for complete removal of crusted resist films. In the second part of this study, electrochemically enhanced abrasive removal of Ta/TaN films was investigated in solutions containing 2,5 dihydroxy benzene sulfonic acid (DBSA) and potassium iodate (KIO₃). This method known as Electrically-assisted Chemical Mechanical Planarization (ECMP) is generating a lot of interest in IC manufacturing. Ta/TaN films were abraded at low pressures (<0.5 psi) on a polyurethane pad under galvanostatic conditions. The effect of variables including pH, KIO3 concentration, and current density has been explored. In the optimized formulation, tantalum and tantalum nitride removal rates of ~170 A⁰/min and ~200 A⁰/min, respectively have been obtained at a current density of 1 mA/cm². The use of benzotriazole as a copper inhibitor was required to obtain Ta to Cu selectivity of 0.8:1. Additionally, the nature of the oxide film formed on tantalum during the electrochemical abrasion process was characterized.
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Ruzic, Vukan. "Mechanisms of protective FeCO₃ film removal in single-phase flow-accelerated CO₂ corrosion of mild steel /." [St. Lucia, Qld.], 2005. http://adt.library.uq.edu.au/public/adt-QU20060626.102924/index.html.

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Yang, Yang. "Removal Mechanisms of Protective Iron Carbonate Layer in Flowing Solutions." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1339731278.

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Packard, Benjamin H. "Retention and Removal of Bacterial Endospores from Common Drinking Water Distribution System Pipe Materials." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277132818.

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Oancea, Andrei-victor. "Gilded bronze conservation: assessment of protective treatments by accelerated ageing and of treatment removal procedures by laser cleaning." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7321/.

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In the current study, we analyze the effectiveness of an organosilane compound, 3-mercapto-propyl-tri-methoxy-silane (abbreviated PropS-SH), in the corrosion protection of fire-gilded bronzes. Firstly, the coating was applied on as-gilded bronze. Subsequently, it was also applied on pre-patinated bronze, because the substrate on which protective coatings are applied in real conservation interventions are corroded artifacts (cleaning procedures never remove all the corrosion products). Aiming to obtain results that simulate the situation of real artifacts, a dropping test that simulates outdoor exposure in runoff conditions (unsheltered areas of monuments) was employed in order to prepatinate the gilded bronze samples, which are the substrate for applying the protective coating. The preparation of the samples by applying the protective coating was performed in collaboration with the Corrosion Studies Centre “Aldo Daccò” from Ferrara University. After the artificial exposure cycles the samples underwent investigations through a variety of spectroscopic methods including SEM, Raman, FIB, AAS and color measurements. In order to evaluate the possible removal of the organosilane coating, protected samples were subjected to laser cleaning tests and characterized by SEM/EDS so as to assess the changes in composition and morphology of the treated surfaces. The laser cleaning treatment was performed at the Institute of Applied Physics “Nello Carrara” (CNR Sesto Fiorentino (FI)). The morphology and chemical composition of the samples was observed before and after the operation in order to obtain information about the fluence and type of laser which are best suited to the removal of this type of coating.
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Cordier, Marie. "Outdoor bronze conservation: assessment of protective treatments by accelerated aging and of treatment removal procedures by laser cleaning." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5731/.

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Outdoor bronzes exposed to the environment form naturally a layer called patina, which may be able to protect the metallic substrate. However, since the last century, with the appearance of acid rains, a strong change in the nature and properties of the copper based patinas occurred [1]. Studies and general observations have established that bronze corrosion patinas created by acid rain are not only disfiguring in terms of loss of detail and homogeneity, but are also unstable [2]. The unstable patina is partially leached away by rainwater. This leaching is represented by green streaking on bronze monuments [3]. Because of the instability of the patina, conservation techniques are usually required. On a bronze object exposed to the outdoor environment, there are different actions of the rainfall and other atmospheric agents as a function of the monument shape. In fact, we recognize sheltered and unsheltered areas as regards exposure to rainwater [4]. As a consequence of these different actions, two main patina types are formed on monuments exposed to the outdoor environment. These patinas have different electrochemical, morphological and compositional characteristics [1]. In the case of sheltered areas, the patina contains mainly copper products, stratified above a layer strongly enriched in insoluble Sn oxides, located at the interface with the uncorroded metal. Moreover, different colors of the patina result from the exposure geometry. The surface color may be pale green for unsheltered areas, and green and mat black for sheltered areas [4]. Thus, in real outdoor bronze monuments, the corrosion behavior is strongly influenced by the exposure geometry. This must be taken into account when designing conservation procedures, since the patina is in most cases the support on which corrosion inhibitors are applied. Presently, for protecting outdoor bronzes against atmospheric corrosion, inhibitors and protective treatments are used. BTA and its derivatives, which are the most common inhibitors used for copper and its alloy, were found to be toxic for the environment and human health [5, 6]. Moreover, it has been demonstrated that BTA is efficient when applied on bare copper but not as efficient when applied on bare bronze [7]. Thus it was necessary to find alternative compounds. Silane-based inhibitors (already successfully tested on copper and other metallic substrates [8]), were taken into consideration as a non-toxic, environmentally friendly alternative to BTA derivatives for bronze protection. The purpose of this thesis was based on the assessment of the efficiency of a selected compound, to protect the bronze against corrosion, which is the 3-mercapto-propyl-trimethoxy-silane (PropS-SH). It was selected thanks to the collaboration with the Corrosion Studies Centre “Aldo Daccò” at the Università di Ferrara. Since previous studies [9, 10, 11] demonstrated that the addition of nanoparticles to silane-based inhibitors leads to an increase of the protective efficiency, we also wanted to evaluate the influence of the addition of CeO2, La2O3, TiO2 nanoparticles on the protective efficiency of 3-mercapto-propyl-trimethoxy-silane, applied on pre-patinated bronze surfaces. This study is the first section of the thesis. Since restorers have to work on patinated bronzes and not on bare metal (except for contemporary art), it is important to be able to recreate the patina, under laboratory conditions, either in sheltered or unsheltered conditions to test the coating and to obtain reliable results. Therefore, at the University of Bologna, different devices have been designed to simulate the real outdoor conditions and to create a patina which is representative of real application conditions of inhibitor or protective treatments. In particular, accelerated ageing devices by wet & dry (simulating the action of stagnant rain in sheltered areas [12]) and by dropping (simulating the leaching action of the rain in unsheltered areas [1]) tests were used. In the present work, we used the dropping test as a method to produce pre-patinated bronze surfaces for the application of a candidate inhibitor as well as for evaluating its protective efficiency on aged bronze (unsheltered areas). In this thesis, gilded bronzes were also studied. When they are exposed to the outside environment, a corrosion phenomenon appears which is due to the electrochemical couple gold/copper where copper is the anode. In the presence of an electrolyte, this phenomenon results in the formation of corrosion products than will cause a blistering of the gold (or a break-up and loss of the film in some cases). Moreover, because of the diffusion of the copper salts to the surface, aggregates and a greenish film will be formed on the surface of the sample [13]. By coating gilded samples with PropS-SH and PropS-SH containing nano-particles and carrying out accelerated ageing by the dropping test, a discussion is possible on the effectiveness of this coating, either with nano-particles or not, against the corrosion process. This part is the section 2 of this thesis. Finally, a discussion about laser treatment aiming at the assessment of reversibility/re-applicability of the PropS-SH coating can be found in section 3 of this thesis. Because the protective layer loses its efficiency with time, it is necessary to find a way of removing the silane layer, before applying a new one on the “bare” patina. One request is to minimize the damages that a laser treatment would create on the patina. Therefore, different laser fluences (energy/surface) were applied on the sample surface during the treatment process in order to find the best range of fluence. In particular, we made a characterization of surfaces before and after removal of PropS-SH (applied on a naturally patinated surface, and subsequently aged by natural exposure) with laser methods. The laser removal treatment was done by the CNR Institute of Applied Physics “Nello Carrara” of Sesto Fiorentino in Florence. In all the three sections of the thesis, a range of non-destructive spectroscopic methods (Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS), μ-Raman spectroscopy, X-Ray diffractometry (XRD)) were used for characterizing the corroded surfaces. AAS (Atomic Absorption Spectroscopy) was used to analyze the ageing solutions from the dropping test in sections 1 and 2.
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Wenk, Christine. "Household scale arsenic removal from drinking water with zero-valent iron corrosion products and performance of Kanchan-type iron nail filters with different synthetic groundwaters /." Zürich : ETHZ, Swiss Federal Institute of Technology Zürich, Department of Environmental Sciences, 2008. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=421.

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Sázavská, Věra. "Příprava modelových korozních vrstev na železe a jejich plazmochemická redukce." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-233369.

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The plasmachemical removal process of corrosion layers is based on a reduction effect of RF hydrogen low-pressure plasma, and it is used for archaeological objects. Incrustation layers on artifact surface become brittle and porous due to plasma processing. The structure and composition of corrosion layers is changed. Therefore, it is much easier to recover the original surface of the plasma treated artifacts in contrary to those treated by conventional ways. Moreover, we can save time on invasive and thus dangerous mechanical removal of corrosion layers as for example sanding is. After plasma treatment, we can observe fine details of the original surface and memory of tools used during its manufacturing. These details are important information on the origin and manufacturing methods of the artifacts. The plasma reduction process leads to the removal of impurities from cavities as well, and a function of mechanical components of archaeological object can be restored. Moreover, chlorides can be easily removed from the corrosion layers and thus any significant post-corrosion is protected. Each archaeological object is original and it has its own “corrosion history”. First, the object had been exposed to the atmosphere for a long time. Then, it had been often placed in a tomb or grave or it otherwise got into the soil or sea. Thus, each archaeological object was exposed to different corrosion stress (humidity, composition of corrosive environment, etc.). Due to these facts, any universal way of a corroded object treatment is very difficult or even impossible to propose. In this work, the problem was solved using model samples of common metals which were treated at various plasma treatment conditions. Archaeological objects made of iron are the most common artifacts, and the typical corrosion products on iron are akaganeite, rokuhnite, and szomolnokite. These three corrosion products were created on the model samples in laboratory and then, the plasmachemical reduction was applied for their removal. The experiment was done in a Quartz cylindrical reactor with capacitive coupled RF plasma created using outer electrodes. We used discharge power from 100 W to 400 W in a continuous or pulsed regime (duty cycle of 75 %, 50 % and 25 %). Flowing plasma was created in pure hydrogen at pressure of 150200 Pa. Sample temperature was monitored by a thermocouple, and it did not exceed 200C during all these experiments. This temperature is regarded as a limit temperature for metallographic changes of archaeological iron. Higher temperature can cause destruction of archaeological iron objects. The optical emission spectroscopy of OH radical was used for the process monitoring. We focused on the monitoring of OH-radicals generated in the plasma, which are characteristic species formed by this process. Each corrosion product has a different time evaluation of generated OH-radicals, which is closely related to the degradation of a given corrosion product. Corrosion layers were analyzed before and after the plasmachemical reduction by SEM-EDX. We have found that the plasmachemical reduction is not very suitable for the szomolnokite corrosion product, which is degraded with difficulty and at high applied powers, only. However, very good removal efficiency was obtained for the rokuhnite and akaganeite corrosion.
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Books on the topic "Corrosion removal"

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Turner, C. W. The deposition and removal of sub-micron particles of magnetite at the surface of alloy 800. Chalk River, Ont: System Chemistry and Corrosion Branch, Chalk River Laboratories, 1994.

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Murtaza, Ziauddin, ed. Formation, removal, and inhibition of inorganic scale in the oilfield environment. [Richardson, Tex.?]: Society of Petroleum Engineers, 2008.

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Optimisation of Corrosion Control for Lead in Drinking Water Using Computational Modelling Techniques. IWA Publishing, 2013.

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Natural organic matter in drinking water: Origin, characterization, and removal : workshop proceedings, September 19-22, 1993, Chamonix, France. [S.l.]: The Foundation, 1994.

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Book chapters on the topic "Corrosion removal"

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Dickmann, K., J. Hildenhagen, J. Studer, and E. Müsch. "Archaeological Ironwork: Removal of Corrosion Layers by Nd:YAG-Laser." In Springer Proceedings in Physics, 71–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27176-7_9.

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Gowri Shankar, K. S., and K. R. Ponnsahana. "Techniques on Corrosion Prevention and Rust Removal on Different Steels." In Lecture Notes in Mechanical Engineering, 251–60. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9809-8_21.

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Gotman, Irena. "Biomechanical and Tribological Aspects of Orthopaedic Implants." In Springer Tracts in Mechanical Engineering, 25–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_2.

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AbstractOrthopaedic and dental implant treatments have allowed to enhance the quality of life of millions of patients. Total hip/knee arthroplasty is a surgical replacement of the hip/knee joint with an artificial prosthesis. The aim of joint replacement surgery is to relieve pain improve function, often for sufferers of osteoarthritis, which affects around a third of people aged over fifty. Nowadays, total hip and knee replacement (THR) surgeries are considered routine procedures with generally excellent outcomes. Given the increasing life expectancy of the world population, however, many patients will require revision or removal of the artificial joint during their lifetime. The most common cause of failure of hip and knee replacements is mechanical instability secondary to wear of the articulating components. Thus, tribological and biomechanical aspects of joint arthroplasty are of specific interest in addressing the needs of younger, more active patients. The most significant improvements in the longevity of artificial joints have been achieved through the introduction of more wear resistant bearing surfaces. These innovations, however, brought about new tribocorrosion phenomena, such as fretting corrosion at the modular junctions of hip implants. Stiffness mismatch between the prosthesis components, non-physiological stress transfer and uneven implant-bone stress distribution are all involved in premature failure of hip arthroplasty. The development of more durable hip and knee prostheses requires a comprehensive understanding of biomechanics and tribocorrosion of implant materials. Some of these insights can also be applied to the design and development of dental implants.
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LaQUE, F. L. "Appendix – Chemical and Electrochemical Methods for the Removal of Corrosion Products." In Corrosion, 19:119–19:121. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-08-052351-4.50139-4.

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Cyprowski, Marcin. "Removal of Microbial Corrosion from a Building." In Microbiological Corrosion of Buildings, 103–10. CRC Press, 2020. http://dx.doi.org/10.1201/9781003048435-9.

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Haidemenopoulos, G. N., and Helen J. Kamoutsi. "Corrosion-Induced Hydrogen Embrittlement in AA2024." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000215.

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Embrittlement of aluminum alloy 2024 caused by corrosion-induced hydrogen evolution and trapping is discussed in this article. The current literature on corrosion mechanisms, hydrogen trapping, and mechanisms of hydrogen embrittlement is briefly reviewed. Accelerated corrosion tests followed by thermal desorption spectroscopy enabled the identification of hydrogen traps in the microstructure of the material. The nature of these traps was identified by controlled experiments involving solution treatments and plastic deformation prior to corrosion, in order to alter the alloy microstructure. The high-temperature trap is related to the S–CuMgAl2 phase. In the absence of this phase, hydrogen is trapped in vacancies, which liberate hydrogen at even higher temperatures. The lower temperature trap is related to dislocations. The hydrogen trapped at dislocations increases with plastic strain up to a certain strain and then decreases. The hydrogen generated by corrosion diffuses in the interior of the material and establishes a hydrogen-affected zone beneath the corrosion layer. Removal of the corrosion layer leads to complete restoration of yield strength but only partial restoration of ductility. Removal of the corrosion layer and heating at a high enough temperature to activate all traps for hydrogen desorption leads to complete restoration of ductility. A mechanism of corrosion-induced hydrogen embrittlement is suggested.
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Monette, D. "Coating removal techniques in the aerospace industry." In Corrosion Control in the Aerospace Industry. CRC Press, 2009. http://dx.doi.org/10.1201/9781439829202.ch10.

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Monette, D. L. "Coating removal techniques in the aerospace industry." In Corrosion Control in the Aerospace Industry, 225–47. Elsevier, 2009. http://dx.doi.org/10.1533/9781845695538.3.225.

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Keshavamurthy R., Naveena B. E., and Sekhar N. "Thermal Spray Coatings for Erosion-Corrosion Protection." In Production, Properties, and Applications of High Temperature Coatings, 246–67. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4194-3.ch010.

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This chapter discuss extensively on various thermal spray coatings for erosion-corrosion protection of industrial components, feedstock materials and their characteristics. Various coating removal mechanisms in thermal spray coatings have been presented. Influence of process variables, test parameters, coating thickness and working temperature on performance of thermal spray coatings for erosion-corrosion have been discussed comprehensively. Further, the concern of erodent's suspended in fluids, disintegrating and resulting in significant wear of the surfaces due to erosion-corrosion phenomenon also reported here.
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Matani, Ashok G., and Viraj Dusane. "Advanced Intelligent Corrosion Removal Maintenance Techniques Towards Failure Prevention and Enhanced Life of Steel Structures." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220770.

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The various root causes of the failure occurred within the structure, the fortification on its failure, anatomy of the structural repair, the exclusive facts associated with innovative methods and protective treatment and lots of a lot of things are mentioned and presented during this project report. The target of building maintenance to form the building and their connected services are in the secure and guarded condition, to grant guarantee that the condition of building meets all legislative standards and requirement to perform the upkeep work indispensable to uphold the worth of physical assists of the building and additionally to accomplish the work essential to keep up the prevalence of the building maintenance. In a world today main problem is corrosion its losses economic and life. Corrosion can be prevented but not long time. Hence, we find out new treatment called as Sanjivani, and it is best for corrosion removal in current time comparatively other methods. Comparison analysis and test conducted result and equation and formula and whole procedure is given in our research paper. This is newly invented by us, still test going on it, it is future of maintenance repair and biggest assets war again corrosion. We have included various prevention measures and corrosion removal techniques used in industry and market currently and we have analyzed it by our point of view and given diagrammatic representation of methodology in form of flow chart and various apparatus used its benefits over existing methods advantages and old principle required for our test equation and derived our results and conclusion using standard norms.
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Conference papers on the topic "Corrosion removal"

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Trego, Angela, Eric D. Haugse, and Eric Udd. "Material removal rate fiber optic corrosion sensor." In Pacific Northwest Fiber Optic Sensor Workshop, edited by Chuck C. Jung and Eric Udd. SPIE, 1998. http://dx.doi.org/10.1117/12.323422.

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Kumar, Arunesh, and Garima Misra. "Environmentally Acceptable Corrosion Inhibitor for Filter-Cake Removal System." In SPE Western Regional & AAPG Pacific Section Meeting 2013 Joint Technical Conference. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/165319-ms.

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Park, Jin-Goo, Heon-Yul Ryu, Tae-Gon Kim, Nagendra Prasad Yerriboina, Yutaka Wada, Satomi Hamada, and Hirokuni Hiyama. "The Adsorption and Removal of Corrosion Inhibitors During Metal CMP." In 2020 China Semiconductor Technology International Conference (CSTIC). IEEE, 2020. http://dx.doi.org/10.1109/cstic49141.2020.9282467.

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Shifler, David A. "The Increasing Complexity of Hot Corrosion." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-65281.

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It has been conjectured that if sulfur in fuel is removed, engine materials will cease to experience attack from hot corrosion, since this sulfur has been viewed as the primary cause of hot corrosion and sulfidation. Historically, hot corrosion has been defined as an accelerated degradation process that generally involves deposition of corrosive species (e.g., sulfates) from the surrounding environment (e.g., combustion gas) onto the surface of hot components, resulting in destruction of the protective oxide scale. Most papers in the literature, since the 1970s, consider sodium sulfate salt as the single specie contributing to hot corrosion. Recent Navy standards for Navy F-76 and similar fuels have dropped the sulfur content down to 15 parts per million (ppm). Most observers believe that the removal of sulfur will end hot corrosion events in the Fleet. However, the deposit chemistry influencing hot corrosion is known to be much more complex consisting of multiple sulfates and silicates. Sulfur species may still enter the combustion chamber via ship’s air intake, which may include seawater entrained in the air. In addition to sodium sulfate, seawater contains magnesium, calcium and potassium salts, and atmospheric contaminants that may contribute to hot corrosion. This paper will cover some of the revised understanding of hot corrosion and consider other possible contaminants that could further complicate a full understanding of hot corrosion.
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Rooklidge, Stephen. "Passive Slow Sand Filter Amendments for Clay Removal and Corrosion Control." In World Water and Environmental Resources Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40685(2003)160.

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Horton, Robert L. Bob, and Morris Arvie. "Preventing Environmentally Induced Corrosion Cracking in High-Strength, Corrosion-Resistant Alloys by Removal of Thiocyanates From Completion Brines." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/110111-ms.

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Gamal, Hany, Salaheldin Elkatatny, Saad Al-Afnan, and Mohamed Bahgat. "Toward Developing Non-Corrosive Acid System for Complex Scales Removal." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21400-ms.

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Abstract Oil and gas industry deals with fluid streams with different ions and concentrations that might cause scale precipitation. The scale precipitation, will thereafter, affect the fluid flow characteristics. Many problems will be raised by the scale deposition that affects the overall petroleum production. This paper aims to develop a non-corrosive acid system with high dissolution efficiency for field complex scales. The paper provided a series of lab analysis that covers the compositional analysis for the collected scale sample, and evaluating the developed acid system for compatible and stable properties, dissolution efficiency, and the corrosive impact. A field scale sample that has a composite chemical composition of calcium carbonate, calcium sulfate, kaolinite, barium sulfate, magnetite, and halite with different weight percentages by employing the diffraction of X-ray technology. Developing the new scale dissolver was achieved by specific compositional study for the organic acids to achieve high dissolution efficiency and low corrosive impact for the field treatment operations. The study results showed the successful scale removal for the developed dissolver at 160 and 210 °F by dissolution efficiency 100 % for 5 hours. The fluid showed a stable and compatible performance with low rate of solids precipitation after the scale treatment (2.3 %). The developed dissolver has a pH of 9. The corrosion test was conducted without any scale inhibitors and the results showed the low corrosion effect by 0.0129 lbm/ft2. The obtained successful results will help to dissolve such complex field scales, maintain the well equipment, and maintain the petroleum production from scale issues.
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Gamal, Hany, Saad Al-Afnan, Salaheldin Elkatatny, and Mohamed Bahgat. "Increasing ESP Lifetime by Employing Novel Non-Corrosive Acid System for Scales Removal." In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204405-ms.

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Abstract The scales precipitated on the electric submersible pump (ESP) will lead to trapped heat, lower the motor's cooling capacity, decrease the pump lifetime, and finally pump failure. Removal of oil field scales commonly requires low pH acid that can cause corrosion, hydrogen sulfide evolution, ferric and ferrous hydroxide precipitation, iron sulfide as a by-product, and/or sulfur precipitation. Scales typically occur in the near wellbore, tubing, downhole pumps, and surface equipment. A mineral deposition is widespread with a change in pressure, temperature, pH, and incompatible mixing between injected seawater and formation water. This paper presents a new scale dissolver that is non-corrosive and has a high scale dissolution performance for barium sulfate scales. The study explains a series of comprehensive experimental lab tests such as X-ray diffraction (XRD), X-ray fluorescence (XRF), brine compositional analysis, fluid compatibility and stability, solubility test, precipitation tendency for the dissolved solids, and corrosion test to evaluate and simulate the field application of the new dissolver using two field scale types that mainly contain barium sulfate (BaSo4) scales. The obtained successful results indicated that the novel dissolver had a great dissolution efficiency for two real barium scale samples as the results showed that the dissolution rate recorded 91.3 and 78.4 % at 90 °C for samples 1 and 2 respectively. The novel dissolver showed a very low precipitation tendency for the scale dissolved solids (1.9 and 3.2 % for samples 1 and 2 respectively). Without any additives of corrosion inhibitors, the corrosion rate was 0.00376 lb/ft2 at 1000 psi and 50 °C for 6 hours. The obtained successful results will help to dissolve the barium sulfate scales, maintain the ESP performance, increase the lifetime, and save extra cost for the pump operational problems due to scale precipitations.
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Gamal, Hany, Salaheldin Elkatatny, Abdulaziz A. Al-Majed, Saad Al-Afnan, and Mohamed Bahgat. "Increasing ESP Lifetime by Employing Novel Non-Corrosive Acid System for Scales Removal." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22512-ea.

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Abstract The scales precipitated on the electric submersible pump (ESP) will lead to trapped heat, lower the motor's cooling capacity, decrease the pump lifetime, and finally pump failure. Removal of oil field scales commonly requires low pH acid that can cause corrosion, hydrogen sulfide evolution, ferric and ferrous hydroxide precipitation, iron sulfide as a by-product, and/or sulfur precipitation. Scales typically occur in the near wellbore, tubing, downhole pumps, and surface equipment. A mineral deposition is widespread with a change in pressure, temperature, pH, and incompatible mixing between injected seawater and formation water. This paper presents a new scale dissolver that is non-corrosive and has a high scale dissolution performance for barium sulfate scales. The study explains a series of comprehensive experimental lab tests such as X-ray diffraction (XRD), X-ray fluorescence (XRF), brine compositional analysis, fluid compatibility and stability, solubility test, precipitation tendency for the dissolved solids, and corrosion test to evaluate and simulate the field application of the new dissolver using two field scale types that mainly contain barium sulfate (BaSo4) scales. The obtained successful results indicated that the novel dissolver had a great dissolution efficiency for two real barium scale samples as the results showed that the dissolution rate recorded 91.3 and 78.4 % at 90 °C for samples 1 and 2 respectively. The novel dissolver showed a very low precipitation tendency for the scale dissolved solids (1.9 and 3.2 % for samples 1 and 2 respectively). Without any additives of corrosion inhibitors, the corrosion rate was 0.00376 lb/ft2 at 1000 psi and 50 °C for 6 hours. The obtained successful results will help to dissolve the barium sulfate scales, maintain the ESP performance, increase the lifetime, and save extra cost for the pump operational problems due to scale precipitations.
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Wiggen, Frode, Maren Justnes, and Sindre Espeland. "Risk Based Management of Corrosion Under Insulation." In SPE International Oilfield Corrosion Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205040-ms.

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Abstract Risk Based Management of Corrosion Under Insulation, DNVGL-RP-G109© Corrosion Under Insulation (CUI) is a major challenge for different process industries. Today it is managed in many ways, ranging from full removal of insulation to minimal maintenance including some inspection with insufficient non-destructive testing. These two extremes exhibit a lack of understanding and a lack of systematic approach in managing the CUI risk, globally. The paper will describe the results from a recent (2017-2019) CUI Joint Industry Project (JIP) where the oil and gas industry in the North Sea area has established a methodology for managing the CUI threat. In this context managing the CUI threat involves risk assessment, risk mitigation, risk update and experience transfer in a systematic manner. The methodology assesses four CUI barriers: material, coating, water wetting and design. DNV GL has made this methodology available for the industry in DNVGL-RP-G109 "Risk Based Management of Corrosion Under Insulation" Copyright © DNV AS. 2019 All rights reserved. (1) issued in December 2019. The Recommended Practice is issued alongside a cloud-based web application, the "CUI Manager" Copyright © DNV AS. 2020 All rights reserved. (2) that ease and supports the implementation of the work process described in the RP. This web application can be aligned with individual company specific requirements, as well as solely rely on the DNV GL RP methodology, or use a combination of the two.
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Reports on the topic "Corrosion removal"

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Zapp, P. E. Assessment of Tank 18 Corrosion During Waste Removal. Office of Scientific and Technical Information (OSTI), September 2002. http://dx.doi.org/10.2172/801202.

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Page, Jason S. Report for the Corrosion Testing of Solutions to Aid in the Removal of 241-AP-106 Waste: Dilution Series Testing. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1512294.

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Smith, H. D., and M. R. Elmore. Corrosion studies of carbon steel under impinging jets of simulated slurries of neutralized current acid waste (NCAW) and neutralized cladding removal waste (NCRW). Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5636391.

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Smith, H. D., and M. R. Elmore. Corrosion studies of carbon steel under impinging jets of simulated slurries of neutralized current acid waste (NCAW) and neutralized cladding removal waste (NCRW). Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10119373.

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DUNCAN JB and COOKE GA. FINAL ANALYTICAL RESULTS FROM THE EXAMINATION OF CORROSION ON SECTIONS OF CORROSION PROBE REMOVED FROM TANK 241-AN-107 ON 08/10/2006. Office of Scientific and Technical Information (OSTI), March 2007. http://dx.doi.org/10.2172/940013.

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Timpe, R. C., and T. R. Aulich. Task 20 - Prevention of Chloride Corrosion in High-Temperature Waste Treatment Systems (Corrosives Removals from Vitrification Slurries). Office of Scientific and Technical Information (OSTI), November 1998. http://dx.doi.org/10.2172/3900.

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Kingston, A. W., A. Mort, C. Deblonde, and O H Ardakani. Hydrogen sulfide (H2S) distribution in the Triassic Montney Formation of the Western Canadian Sedimentary Basin. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329797.

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The Montney Formation is a highly productive hydrocarbon reservoir with significant reserves of hydrocarbon gases and liquids making it of great economic importance to Canada. However, high concentrations of hydrogen sulfide (H2S) have been encountered during exploration and development that have detrimental effects on environmental, health, and economics of production. H2S is a highly toxic and corrosive gas and therefore it is essential to understand the distribution of H2S within the basin in order to enhance identification of areas with a high risk of encountering elevated H2S concentrations in order to mitigate against potential negative impacts. Gas composition data from Montney wells is routinely collected by operators for submission to provincial regulators and is publicly available. We have combined data from Alberta (AB) and British Columbia (BC) to create a basin-wide database of Montney H2S concentrations. We then used an iterative quality control and quality assurance process to produce a dataset that best represents gas composition in reservoir fluids. This included: 1) designating gas source formation based on directional surveys using a newly developed basin-wide 3D model incorporating AGS's Montney model of Alberta with a model in BC, which removes errors associated with reported formations; 2) removed injection and disposal wells; 3) assessed wells with the 50 highest H2S concentrations to determine if gas composition data is accurate and reflective of reservoir fluid chemistry; and 4) evaluated spatially isolated extreme values to ensure data accuracy and prevent isolated highs from negatively impacting data interpolation. The resulting dataset was then used to calculate statistics for each x, y location to input into the interpolation process. Three interpolations were constructed based on the associated phase classification: H2S in gas, H2S in liquid (C7+), and aqueous H2S. We used Empirical Bayesian Kriging interpolation to generate H2S distribution maps along with a series of model uncertainty maps. These interpolations illustrate that H2S is heterogeneously distributed across the Montney basin. In general, higher concentrations are found in AB compared with BC with the highest concentrations in the Grande Prairie region along with several other isolated region in the southeastern portion of the basin. The interpolations of H2S associated with different phases show broad similarities. Future mapping research will focus on subdividing intra-Montney sub-members plus under- and overlying strata to further our understanding of the role migration plays in H2S distribution within the Montney basin.
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Page, Jason S. Final Report for the Erosion-Corrosion Anaysis of Tank 241-AW-02E Feed Pump Pit Jumpers B-2 and 1-4 Removed from Service in 2013. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1129798.

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Recommendations for Departmental Collections Policies. Smithsonian Research Online, November 2021. http://dx.doi.org/10.5479/10088/111834.

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An aged and heavily corroded horizontal iron rim lock for the left side of a door was examined at the request of Anson (“Tuck”) Hines, Director of the Smithsonian Environmental Research Center (SERC). The lock was reportedly found by a contractor on SERC’s property during renovation, and the iron corrosion is typical of exposure to the elements. It was anticipated that the lock would date from the time of the oldest part of the Sellman/Kirkpatrick-Howat house constructed in 1735 or its Greek Revival enlargement in 1841. Examination of the lock included x-radiography. A recommendation was made to not conduct further conservation treatment, such as removal of iron corrosion, because it would threaten the structural integrity of the object. Instead it was advised that the lock be exhibited in a case with conditioned silica gel and regularly monitored, which should keep it in stable condition.
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