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Готові списки джерел за темами / Anodic dissolution currents

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Добірка наукової літератури з теми "Anodic dissolution currents"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Anodic dissolution currents"

1

Shepida, M. V., M. A. Sozanskyi, Yu V. Sukhatskiy, A. S. Mazur, and О. І. Kuntyi. "Sonoelectrochemical synthesis of silver nanoparticles in polyvinylpyrrolidone solutions." Chemistry, Technology and Application of Substances 4, no. 1 (2021): 82–87. http://dx.doi.org/10.23939/ctas2021.01.082.

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The results of investigations of the influence of main parameters (surfactant concentration and temperature) on the synthesis of silver nanoparticles (AgNPs) by the sonoelectrochemical method in polyvinylpyrrolidone (PVP) solutions by cyclic voltammetry (CVA) are presented. It is shown that the ultrasonic field (22 kHz) leads to an increase in the anodic and cathodic currents by ~30 %. A scheme of the AgNPs formation has been proposed, which includes the following main processes: 1) dissolution of sacrificial silver anodes at E = 0.2...1.0 V with the formation of [AgPVP]+ complex ions; 2) cath

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2

Drazic, Dragutin, Jovan Popic, B. Jegdic, and D. Vasiljevic-Radovic. "Electrochemistry of active chromium, part IV: Dissolution of chromium in deaerated sulfuric acid." Journal of the Serbian Chemical Society 69, no. 12 (2004): 1099–110. http://dx.doi.org/10.2298/jsc0412099d.

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Chromium dissolution in aqueous sulfuric acid solutions in the pH range 0.5 ?3 was studied electrochemically by the potentiostatic or very slow potentiodynamic method, and by the analyses of the Cr ion concentrations in the electrolyte formed during the experiments. It was shown that the electrochemical anodic dissolution follows a common Tafel line with a slope of ca. 120 mVdec-1, independent of the solution pH and the hydrodynamics while the passivation potentials and passivation currents were independent on hydrodynamics but strongly dependent on the pH. In parallel with the electrochemical

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3

Scheer, Kilian M., Meredith Tulloch, Ines Hamam, Jeffin James Abraham, Michel B. Johnson, and Michael Metzger. "Anodic Dissolution of the Aluminum Current Collector in Lithium-ion Cells with LiFSI, LiPF₆, and LiBF₄." Journal of The Electrochemical Society 172, no. 1 (2025): 010511. https://doi.org/10.1149/1945-7111/ada641.

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Anodic dissolution (often referred to as corrosion) of the positive electrode aluminum current collector can be a limiting factor for the performance, lifetime, and safety of lithium-ion cells. The superior performance of lithium bis(fluorosulfonyl)imide (LiFSI) salt, especially in high-temperature lithium-ion cells, motivates this study of the Al current collector corrosion in electrolytes with and without LiFSI. With pure lithium hexafluorophosphate (LiPF6) and lithium tetrafluoroborate (LiBF4) or LiFSI blends of these salts, only minor Al corrosion currents were found in cyclic voltammetry

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4

TUDOR, ADRIAN IONUȚ, and RAZVAN GEORGE RIPEANU. "BEM simulation on the influence of dispersion currents on buried pipes." Journal of Engineering Sciences and Innovation 6, no. 3 (2021): 335–48. http://dx.doi.org/10.56958/jesi.2021.6.3.10.

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The aim of this paper is to provide a method for modelling the influence of stray currents on buried pipes, using as calculation the boundary element method (BEM), using the module dedicated to corrosion in COMSOL Multiphysics software, which allows investigation both macroscopically and microscopically of corrosion processes. Dispersion currents, often called stray currents, are considered currents that follow little-known trajectories in the ground, but which can affect underground gas pipelines. Their sources are external to the pipes and contribute to the lowering of the anodic potential u

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5

Gudic, Senka, Ladislav Vrsalovic, Ana Radeljic, et al. "Comparison of corrosion behaviour of copper and copper alloys in aqueous chloride solution." Chemical Industry and Chemical Engineering Quarterly, no. 00 (2021): 7. http://dx.doi.org/10.2298/ciceq200701007g.

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A comparative corrosion study of Cu and Cu-Al, Cu-Al-Ni, Cu-Al-Mn, and Cu-Al-Mn-Ni in 0.5 mol dm-3 NaCl solution was performed using an open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements (EIS). Scanning electron microscopy/Energy-dispersive X-ray spectroscopy (SEM/EDS) analysis was used to evaluate corrosive damage on the sample surface after polarization measurements. The reported results suggest that the alloying elements have reduced cathodic and anodic current densities in the Tafel region, increased anodic currents at higher anodi

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6

Virtanen, Sannakaisa. "Respirometric Studies on Transpassive Dissolution." ECS Meeting Abstracts MA2024-02, no. 15 (2024): 1626. https://doi.org/10.1149/ma2024-02151626mtgabs.

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Recently, we introduced respirometric methods for real-time monitoring of corrosion, both for atmospheric corrosion [1] and immersion conditions [2]. The approach is based on monitoring the rate of the cathodic reactions with help of different types of sensors; this enables to track the O2 reduction reaction and the H2 evolution reaction simultaneously. The set-ups have been used to study different corrosion scenarios under free corrosion conditions. Even more recently, the respirometric setups were coupled with electrochemistry [3, 4], enabling the corrosion cases to be studied not only at op

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7

Shepida, Mariana, Orest Kuntyi, Martyn Sozanskyi, and Yuriy Sukhatskiy. "Sonoelectrochemical Synthesis of Antibacterial Active Silver Nanoparticles in Rhamnolipid Solution." Advances in Materials Science and Engineering 2021 (June 14, 2021): 1–9. http://dx.doi.org/10.1155/2021/7754523.

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The results of studies of the synthesis of AgNPs colloidal solutions by cyclic voltammetry (E from +1.0 to −1.0 V) in rhamnolipid (RL) solutions and the use of soluble anodes in the ultrasound field (22 kHz) are presented. It is shown that the algorithm of anodic dissolution—reduction of Ag(I)—nucleation, and formation of AgNPs makes it possible to obtain nanoparticles with the size from 1 nm to 3 nm. It was found that with an increase in the RL concentration from 1 g/L to 4 g/L, the anodic and cathodic currents increase as well as the rate of AgNPs formation, respectively. The rate of nanopar

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8

Sherif, El-Sayed M., and Abdulhakim A. Almajid. "Anodic Dissolution of API X70 Pipeline Steel in Arabian Gulf Seawater after Different Exposure Intervals." Journal of Chemistry 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/753041.

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The anodic dissolution of API X70 pipeline steel in Arabian Gulf seawater (AGSW) was investigated using open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), cyclic potentiodynamic polarization (CPP), and current-time measurements. The electrochemical experiments revealed that the X70 pipeline steel suffers both general and pitting corrosion in the AGSW solution. It was found that the general corrosion decreases as a result of decreasing the corrosion current density (jcorr), corrosion rate (Rcorr) and absolute currents as well as the increase of polarization resistance o

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9

El-Sayed, Abdel-Rahman, Hossnia S. Mohran, and Hoda Abdel Shafy Shilkamy. "Role of Indium Alloying with Lead as a Means to Reduce the Passivation Phenomena in Lead/Acid Batteries." International Journal of Electrochemistry 2014 (2014): 1–16. http://dx.doi.org/10.1155/2014/932654.

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The influence of indium content on the anodic behaviour of Pb-In alloys in 4 M H2SO4solution is investigated by potentiodynamic, potentiostatic, chronopotentiometric, and cyclic voltammetric techniques. The composition and microstructure of the corrosion layer on Pb-In alloys are characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy analysis (EDX), and scanning electron microscopy (SEM). The potentiodynamic and chronopotentiometric curves show that the anodic behavior of all investigated electrodes exhibits active/passive transition. The active dissolution (except for

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10

Trifanov, V. I., L. N. Nikitina, K. V. Saraeva, D. I. Malizhonok, and I. V. Trifanov. "Vibration anode-abrasive polishing of channels of small cross section." Journal of Physics: Conference Series 2373, no. 2 (2022): 022068. http://dx.doi.org/10.1088/1742-6596/2373/2/022068.

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Abstract The mechanism of anodic dissolution of microroughnesses in the combined method of anodic-abrasive vibratory polishing with magnetic-abrasive electrically polarized charged grains of channels of pipes of small cross section made of non-magnetic materials is presented. Materials that can be used as magnetic-abrasive composite grains such as Fe3C, FeB, FeB2, etc. or magnetic NbC-Fe modified with graphene, carbon nanotubes, or a combination thereof have been selected. A passivating electrolyte used in this combined method of vibration anode-abrasive polishing, for example, 3% NaNO3 + (3-6

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Більше джерел

Книги з теми "Anodic dissolution currents"

1

Barry, Aaron P. Formation of surface films and periodic current oscillations during anodic dissolution of nickel in sulfuric acid solutions. Laurentian University, 1999.

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Тези доповідей конференцій з теми "Anodic dissolution currents"

1

Jones, Denny A. "Evidence for Localized Surface Plasticity During Stress Corrosion Cracking." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95169.

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Abstract Creep prior to stress corrosion cracking (SCC) has been frequently observed. Externally imposed anodic dissolution currents increase creep rates of pure metals and alloys in environments that do not cause SCC. Creep prior to SCC may result from anodic currents at active film rupture sites caused by coupling to surrounding noble passive surfaces. Several investigators have recently shown a correlation between creep rate and time to failure by SCC, implying that mechanisms of creep and cracking may be related. Recent thin-film diffusion experiments have shown evidence of vacancy formati

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2

Bierwirth, M., J. Goellner, and A. Heyn. "Analysis of Electrochemical Noise Data for the Determination of Different Reactions." In CORROSION 2007. NACE International, 2007. https://doi.org/10.5006/c2007-07369.

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Abstract Electrochemical noise changes the point of view in corrosion research with deeper insights into the elementary courses of corrosion processes. The noise represents itself in a variety of forms. Most applications are related to the initiation of pitting on high-alloyed chromium-nickel-steels. The noise signals contain much information about these processes. This paper is specially devoted to the question, which information is contained in one single event of the electrochemical noise. In the first step, a theoretical model was developed which describes the reactions taking place in the

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3

Kendig, M., S. Jeanjaquet, A. Allen, and J. Lumsden. "Fatigue Admittance of Aluminum Lithium Alloy 8090 in 0.5 Molar NaCl." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89040.

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Abstract Alternating electrochemical currents, Iac, flowing at the tip of a fatigue crack in a compact tension (CT) specimen of underaged Al-Li 8090 under cyclic load relate to the corrosion rate of the crack tip. Iac for the CT specimen in deaerated 0.5 M NaCl depends on applied electrochemical potential and the maximum stress intensity. The minimum of Iac with respect to applied potential is assumed to occur at the corrosion potential of the crack tip, Ec. Ec is anodic to the corrosion potential, Eo of the boldly exposed surface. Iac increases to a greater extent with applied anodic current

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4

Schmitt, Guenter, and Ruediger Forster. "Unexpected Effect of Small Oxygen Concentrations in Sales Gas on Element Currents between Pipeline Steel and Magnetite from Black Powder." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05587.

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Abstract Magnetite as the major part of black powder encountered in transmission pipelines all over the world can form galvanic elements with the pipeline steel, provided a liquid film with some ionic conductivity is present. This galvanic element can exist also in the absence of water, provided other compounds are present to assure some ionic conductivity, e.g. organic acids like formic acid, acetic acid, acetates, or ammonium compounds from inhibitor packages. In this galvanic element iron forms the anode and magnetite the surface for the cathodic reaction. The element currents are in the µA

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5

Hoffmeister, Hans, and Jens Ullrich. "Quantitative Effect of Transient Potentials and Temperature on Crevice Corrosion of Naval Cast Cu-Ni-Al-Valve Bronze in Natural Seawater." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00634.

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Abstract Cast Cu-Al-Ni- bronze valve components for naval seawater supply facilities have frequently been subjected to crevice corrosion, for example, in contact with PTFE. The extent of such local degradation leading to leakage depends on environmental conditions including seawater chemistry as well as local potentials, temperature and flow velocities. The present investigation is based on an actual failure case of a cast Cu-9% Al-5% Ni-5% Fe (UNS C 95800) alloy valve exhibiting crevice corrosion at the contact areas to the PTFE sealing. For identification of incubation times and extent of cr

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6

Kahyarian, Aria, Bruce Brown, and Srdjan Nesic. "Mechanism of CO2 Corrosion of Mild Steel: a New Narrative." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11232.

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Abstract The polarization behavior of API 5L X65 mild steel at various pH values and CO2 partial pressures was investigated at a high flow velocity. In contrast to the commonly accepted mechanistic view of CO2 corrosion, it is shown that the direct reduction of carbonic acid is insignificant at CO2 partial pressures up to 5 bar. That suggests that carbonic acid is merely a “reservoir” of hydrogen ions and its presence only increases the observed limiting current densities by buffering the H+ concentration at the metal surface. Furthermore, the rate of anodic iron dissolution reaction was shown

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7

Klein, Oliver, Hans Hoffmeister, and Jens Uwe Brandt. "Investigation of the Effects of Multiphase Fluid Parameters on Corrosion Currents in Rotating Disc Crevices." In CORROSION 2005. NACE International, 2005. https://doi.org/10.5006/c2005-05119.

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Abstract The increasing use of multiphase pump systems in the oil and gas industry has drawn attention to materials resisting erosion-corrosion in crevices between rotating and fixed pump components. A new type of laboratory test facility enables experimental modeling of respective electrochemical and mechanical wear effects on rotating discs both of the same material at conditions of erosion in the crevice in between. The paper discusses the influences of rotational velocity and crevice dimensions on external corrosion currents between the 17Cr-2Ni forged steel rotating and fixed discs in syn

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8

Zhang, Yingrui, and David J. Quesnel. "Nanoscale Polarizations That Enable Stress Corrosion Cracking." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01678.

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Abstract This paper addresses fundamental mechanisms of stress corrosion cracking by simulating the 3D distribution of electrical charge at the tip of a stress corrosion crack. Ledges and steps on freshly created surfaces interact with electrons that move about on that surface in an effort to maintain a net negative equipotential. Excess electrons stick to the ledges, creating nanoscale variations in electrical polarization of the metal-electrolyte interface. The excess electrons, responsible for the negative free corrosion potential, have a spatially varying density that supports local variat

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9

Hoffmeister, Hans. "Modelling the Effects of Chloride Contents, Ph and Cathodic Polarization on Crevice Corrosion Rates and Corrosion Start Times of Pure Chromium." In CORROSION 2001. NACE International, 2001. https://doi.org/10.5006/c2001-01462.

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Abstract A crevice corrosion model is presented for pure chromium aiming at providing basic information on the mechanisms leading to localized corrosion in an already deoxygenated crevice. Based on selected cathodic and anodic polarization curves the model is operating in successive 10 s time steps assuming thermodynamic equilibria for the dissolution of chromium, the initial formation and final dissolution by chloride ions of the passivating chromiumhydroxide followed by formation of chromiumchloride and hydrochloric acid. While assuming no diffusion of the chromium ions from the crevice, the

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10

Goncharov, A. V., N. N. Glazov, A. M. Pushkarev, and I. Yu Kopiev. "Electrochemical Behavior of Fe-Si Impressed Current Anodes Testing." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02309.

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Abstract High-silicon cast-iron (Fe-Si) anodes are widely used in anode groundbed applications for underground pipelines and offshore construction. Impressed current anodes are crucial element of cathodic protection systems, their quality assessment must be carried out regularly and properly. In this paper, results of Fe-Si anode sample electrochemical testing in 3% NaCl are presented. The purpose of the testing was quality assessment of silicon iron anodes batches from different manufacturers. A potentiodynamic anodic curve for Fe-Si sample in 3% NaCl was obtained and results of laboratory an

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