Relevant bibliographies by topics / Cathodic Disbondment

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  2. Dissertations / Theses
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Academic literature on the topic 'Cathodic Disbondment'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Cathodic Disbondment"

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Fitrullah, Muhammad, Siti Mutia Mawaddah, Wahyudin, P. Tarigan, O. Soesaptri, Suryana, Yanyan Dwiyanti, et al. "The Effect Rust and Over-Protection Voltage of Impressed Current Cathodic Protection towards LR Grade a Steel Disbondment." Applied Mechanics and Materials 842 (June 2016): 92–98. http://dx.doi.org/10.4028/www.scientific.net/amm.842.92.

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Corrosion at the bilge due to direct contact with the seawater is an issue which is necessary to be taken into account. The problem can be solved by giving combined protection such as coating and cathodic protection impressed current cathodic protection (ICCP). For broader range, there is occasionally a possibility of over-protection at certain area especially that is close to anodes. It can trigger cathodic disbondment to occur. Cathodic disbondment is a situation when the coating loses its adhesion to the steel due to the voltage originated from cathodic protection. This trial was conducted by using several samples of LR Grade A plate coated by primer coat epoxy and top coat polyurethane. The plate was then given artificial defect with the size of R2, R3 and R4 accoring to ISO 4628-3 or is equal to 0,5% ; 1% and 8% of the plate surface width. Futhermore, impressed current cathodic protection was conducted with the steel anode, Ag/AgCl reference electrode and over-protection voltage were-1,5 ; -2,0 ; -2,5 ; -3,0 ; -3,5 and-4,0 volt. Electrolyte media employed was seawater. Furthermore, the disbondment taken place was measured after 6 hours and analyzed the corrosion product produced. In the research, it could be seen that the broader the defect was, the smaller the disbondment area was. The width of disbondment area was depending on current density. The smaller the voltage (volt) was, the broader the disbondment in accordance with the increase of disbondment width taking place on the plate surface. The corrosion product produced was Fe3O4 (Magnetite).
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Wang, Xinhua, Zuquan Wang, Yingchun Chen, Xuting Song, and Yong Yang. "Effect of a DC Stray Current on the Corrosion of X80 Pipeline Steel and the Cathodic Disbondment Behavior of the Protective 3PE Coating in 3.5% NaCl Solution." Coatings 9, no. 1 (January 7, 2019): 29. http://dx.doi.org/10.3390/coatings9010029.

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The influence of a direct current (DC) stray current on the corrosion and cathodic disbondment of X80 steel coated with a polyethylene (3PE) coating in 3.5% NaCl solution was studied by immersion experiments, electrochemical tests, three-dimensional microscopy, and a surface analysis. The results showed that the potential of the X80 steel sample shifts under the direct current. After 100A/m2 DC interference was applied, the potential of the sample in the anode region positively shifted from –0.68 to –0.43 V. At the same time, the sample in the cathode region negatively shifted to –1.45 V. Under the DC anode action, the X80 steel corrosion exhibited no passivation and followed Faraday’s law of electrolysis, in which the corrosion rate is proportional to the current density. Three-dimensional (3D) digital microscopy showed that, as the DC current increased, the depth of the corrosion pit also increased (gradually), indicating a higher corrosion degree. The sample in the cathode region only underwent a hydrogen evolution reaction, which caused cathodic disbondment of the coating. The stray current had a critical current density for the coating disbonding: the coating delamination area reached its maximum and then remained unchanged.
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Roy, Debashis, George P. Simon, and Maria Forsyth. "Improved cathodic disbondment performance of polyethylene blends." Polymer Engineering & Science 42, no. 4 (April 2002): 781–89. http://dx.doi.org/10.1002/pen.10990.

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Love, Corey T., Guijun Xian, and Vistasp M. Karbhari. "Cathodic disbondment resistance with reactive ethylene terpolymer blends." Progress in Organic Coatings 60, no. 4 (November 2007): 287–96. http://dx.doi.org/10.1016/j.porgcoat.2007.07.022.

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Kamalanand, N., G. Gopalakrishnan, S. G. Ponnambalam, J. Mathiyarasu, R. N. Natarajan, P. Subramaniam, N. Palaniswamy, and N. S. Rengaswamy. "Role of hydrogen and hydroxyl ion in cathodic disbondment." Anti-Corrosion Methods and Materials 45, no. 4 (August 1998): 243–47. http://dx.doi.org/10.1108/00035599810223779.

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Love, C. T., and V. M. Karbhari. "Filled reactive ethylene terpolymer primers for cathodic disbondment mitigation." Journal of Applied Polymer Science 110, no. 3 (November 5, 2008): 1531–44. http://dx.doi.org/10.1002/app.28564.

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TabkhPaz, Majid, Dong-Yeob Park, Patrick C. Lee, Ron Hugo, and Simon S. Park. "Development of nanocomposite coatings with improved mechanical, thermal, and corrosion protection properties." Journal of Composite Materials 52, no. 8 (July 21, 2017): 1045–60. http://dx.doi.org/10.1177/0021998317720001.

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In this study, new composite coatings are fabricated and investigated for their applications as the metal coating. The studied coatings consist of two-layered composites with various nanoparticulates as fillers in a polymeric matrix (styrene acrylic). The first layer bonded to the steel plate uses a combination of zinc particles, multi-walled carbon nanotubes, and graphene nanoplatelets. For the second layer, hexagonal boron nitride with high electrical insulation properties is added to the matrix. The morphology of the nanoparticulates is conducted using a scanning electron microscope. The coefficient of thermal expansion, cathodic disbondment resistance, gas penetration, and scratch resistance of the coatings are evaluated. The corroded area on the cathodic disbondment test specimens reduced down up to 90% for the composite with zinc (20 wt%), multi-walled carbon nanotubes (2 wt%), and graphene nanoplatelets (2 wt%), compared to a specimen coated with a pure polymer. It is seen that the presence of nanoparticulates decreased gas permeation and thermal expansion of the matrix by 75% and 65%, respectively. The addition of nanoparticulates also enhanced scratch resistance of the coating composites.
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Kuang, Da, and Y. Frank Cheng. "Study of cathodic protection shielding under coating disbondment on pipelines." Corrosion Science 99 (October 2015): 249–57. http://dx.doi.org/10.1016/j.corsci.2015.07.012.

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Mahdavian, M., R. Naderi, M. Peighambari, M. Hamdipour, and S. A. Haddadi. "Evaluation of cathodic disbondment of epoxy coating containing azole compounds." Journal of Industrial and Engineering Chemistry 21 (January 2015): 1167–73. http://dx.doi.org/10.1016/j.jiec.2014.05.030.

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Pud, A. A., and G. S. Shapoval. "On Electrochemical Reductive Destruction and Cathodic Disbondment of Protective Polymeric Coatings." Key Engineering Materials 20-28 (January 1991): 1101–5. http://dx.doi.org/10.4028/www.scientific.net/kem.20-28.1101.

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Dissertations / Theses on the topic "Cathodic Disbondment"

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Love, Corey T. "Cathodic disbondment resistance with reactive ethylene terpolymer blends and composite coatings." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3292000.

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Thesis (Ph. D.)--University of California, San Diego, 2008.
Title from first page of PDF file (viewed June 3, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
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Raghunathan, Anand. "Electrochemical impedance spectroscopy as a method of predict delamination of coated steel in cathodic disbondment tests." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43449.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
Vita.
Includes bibliographical references (leaves 66-67).
by Anand Raghunathan.
M.S.
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Masoudi, Rana Jr. "Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions." Thesis, 2013. http://hdl.handle.net/1807/43192.

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Epoxy-coated reinforcement was developed in the 1970s and became the primary corrosion protection technique in North America. Throughout the years, ECR has exhibited mixed results, with some regions and jurisdictions reporting good corrosion protection while others reported poor field performance of ECR. It has been established that epoxy coating can lose its adhesion in a wet environment thus providing poor corrosion protection of reinforcing steel. However, limited research has been done on the influence of concrete pore solution on adhesion of epoxy coating to reinforcing steel. This research investigates the effect of high alkali conditions on performance of ECR bars. Based on the test results, it was found that the rate of disbondment increases as the hydroxyl ion concentration increases and presence of high temperature accelerates the disbondment process.
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Books on the topic "Cathodic Disbondment"

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Herriot, D. F. Failure in organic coating: Cathodic disbondment and adhesion loss. Manchester: UMIST, 1994.

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Harun, M. K. The effects of surface modifications on the adhesion and cathodic disbondment of organic coatings on mild steel. Manchester: UMIST, 1997.

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Book chapters on the topic "Cathodic Disbondment"

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Ardeshirian Sharifabadi, Shirin, Bahar Hassanpour, and Mohammadreza Mohammadzadeh Attar. "Cathodic Disbondment of Unpigmented Epoxy Coatings: Effect of Thickness, pH, and Curing Conditions." In Eco-friendly and Smart Polymer Systems, 481–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45085-4_117.

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Hill, Davion, Colin Scott, Ayca Ertekin, and Narasi Sridhar. "Performance of Composite Materials in Corrosive Conditions: Evaluation of Adhesion Loss in Polymers Via Cathodic Disbondment and a Newly Developed NDE Technique." In Ceramic Transactions Series, 205–14. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470522189.ch19.

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Conference papers on the topic "Cathodic Disbondment"

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Castle, James E. "Cathodic disbondment." In The proceedings of the 53rd international meeting of physical chemistry: Organic coatings. AIP, 1996. http://dx.doi.org/10.1063/1.49438.

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Chevil, Karina, Abdoulmajid Eslami, Weixing Chen, Reg Eadie, Richard Kania, Robert Worthingham, and Greg Van Boven. "Developing Cathodic Protection Based on Disbondment Geometry." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90675.

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Coating disbondment on pipelines is a common phenomenon that leads to exposure of the pipeline metal to ground water solutions, promoting a corrosive environment which is associated with stress corrosion cracking (SCC). This investigation tracks the corrosion behavior of X-65 steel at different coating disbondments at Open Circuit Potential (OCP) conditions through weight loss tests, as well as SEM analysis. For the weight loss test, X-65 coupons were placed into a vertical coupon holder with varying gap sizes between the coupons and the shielding (2 mm 5 mm, and 10 mm) simulating the coating disbondment. The results of the tests suggest that the corrosion rate inside the gap is dependent on the mass transfer rate of CO2. For larger gaps, the corrosion rate inside the gap decreases almost linearly with position (highest at the top of the disbondment) and is dependent on the iron carbonate film deposition. For smaller gaps (≤5 mm) a galvanic effect was observed between the coupons at the top of the disbondment (anodic) which showed a high degree of general corrosion, and the coupons at the bottom of the disbondment (cathodic) which had very low corrosion rates. The experimental observations were related to the corrosion scenarios found in the field. Cathodic protection strategies with respect to the geometry of disbondment are also discussed.
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Broesder, Ing E. "Coatings and Cathodic Disbondment - The True Story." In Pipelines 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413012.150.

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Sridhar, N., D. S. Dunn, O. Moghissi, F. King, and J. Been. "Predicting Corrosion Under Disbonded Coating Using Modeling and Cathodic Protection Monitoring Coupon." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27018.

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Coating defects generally take the form of either exposed bare steel or a disbondment, where a gap is formed between a relatively intact coating and bare steel. Cathodic protection can be difficult to achieve and monitor in the disbonded regions depending on the type of coating and soil conditions. Furthermore, stress corrosion cracking occurs predominantly under disbonded coatings. This paper describes a numerical modeling approach to predict the potential and chemistry under disbonded coating. In addition, the use of a monitoring coupon to simulate pipeline disbondments is demonstrated.
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Been, Jenny, Russ Given, and Robert Worthingham. "Performance Testing of a Multi-Component Powder Coating System." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10443.

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A number of new coatings offer the possibility for cost savings and/or improved performance. As a shielding coating, the resistance of a high-integrity three-layer coating to disbondment in damaged areas and as a function of applied cathodic potential is of interest with regard to the creation of an environment on the pipe that will support corrosion and/or cracking. The cathodic disbondment (CD) behavior of a multi-component powder coating system has been characterized under simulated field conditions (restrictive mass transport using soils), rather than the standard CSA protocol. The as-received coating displayed excellent impedance properties and minimal disbondment under normal operating conditions. Coated panels were furthermore subjected to impact damage and a hot water soak prior to the CD tests. Results showed minimal disbondment of the multi-component powder coating system over 3 to 6 months regardless of impact damage or temperature. There was some evidence that more negative potentials may increase the disbondment area over longer periods of time. However, mechanistic considerations, literature information, experimental observations and field experiences would suggest that coating disbondment might be limited when the coating is properly applied and otherwise in good condition. Longer-term experiments are required to confirm the presence of a maximum size disbondment.
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Tarhini, Ali A., and Ramsey F. Hamade. "Cathodic Disbondment of Rubber/Steel Adhesive Bonds Modeled as Liquid-Solid Reactions." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63307.

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Under cathodic conditions, rubber/steel adhesive bonded joints have been documented to ‘weaken’ due to attack by the generated alkali. If this were to occur under the action of cleavage mechanical loads, the bonds are likely to completely ‘delaminate’ causing the bonded constituents to physically separate. These two modes of disbondment are referred to as ‘weakening’ and ‘delamination’, respectively. Previously, Hamade and coworkers have implemented empirical and semi-empirical approaches to modeling cathodic disbondment of adhesive joints. Here, a method is presented to simulate bond weakening progress via numerical solutions. Bond degradation is modeled as a liquid-solid chemical reactor due to the attack by the alkaline medium. Specifically, the diffusion and chemical reaction processes involved in weakening are mathematically represented via a simplified, 2 partial differential equations (p.d.e.) boundary value problem (BVP). This is a reduced version of the more complex electrochemical formulation needed to fully describe the chemistry at the bondline under cathodic conditions. The weakening model is capable of simulating weakened bond lengths vs. time as function of electrolyte type (artificial sweater, ASW, or 1N NaOH), cathodic potential, and temperature. Furthermore and to model bond delamination, a mechano-chemical failure criterion is incorporated into the weakening formulation effectively coupling fracture mechanics principles with those of cathodic degradation. A fracture mechanics parameter, applied strain energy release rate, G, is used to represent the effect of externally applied loads. The failure criterion stipulates that the bond will delaminate if the applied G exceeds that of the degraded bond’s residual resistance. Both, the weakening and delamination formulations are validated against experimental data of bond weakening and delamination under a variety of conditions. As such, the numerical simulations developed in this work may be used to provide first order estimates of the life of rubber/steel bonded joints (weakened or delaminated lengths vs. time) as function of cathodic parameters and applied G (if the joint is loaded in the case of delamination).
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Chevil, Karina, Weixing Chen, Greg Van Boven, Richard Kania, and Jenny Been. "Correlating Corrosion Field Data With Experimental Findings for the Development of Pipeline Mitigation Strategies." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33678.

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Coating disbondment on pipelines is a common phenomenon that leads to exposure of the pipeline metal to ground water solutions, promoting a corrosive environment which is associated with stress corrosion cracking (SCC). This investigation aims to understand the corrosion behavior and rate of pipeline steel under coating disbondments of varying sizes based on field data and experimental studies. In the analysis of the field data, dig reports provided by a Canadian gas transportation company were analyzed for cases of anaerobic corrosion under tape coatings. The analyzed field data provided a correlation between the tape coating disbondment size and corrosion rate found under the coating. The experimental studies aimed to understand the field findings. The analyses were performed on X-65 pipeline steel coupons placed in a vertical coupon holder with a PMMA shielding. To imitate the variation in the disbondment size, the gap size between the metal coupons and the shielding was varied (2 mm, 5 mm, and 10 mm, and infinite). The general corrosion rates were obtained through weight loss calculations. The experimental results were compared and correlated with dig-report data from the field for a development of cathodic protection and pipeline mitigation strategies.
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Allan, M. L., C. C. Berndt, J. A. Brogan, and D. Otterson. "Thermal Sprayed Polymer Coatings for Corrosion Protection in a Biochemical Treatment Process." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0013.

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Abstract Thermal sprayed ethylene methacrylic acid (EMAA) and ethylene tetrafluoroethylene (ETFE) coatings were evaluated for corrosion protection in a biochemical process to treat geothermal residues. Coupon, Atlas cell, peel strength and cathodic disbondment tests were performed in aggressive environments including geothermal sludge, hypersaline brine and sulfur oxidizing bacteria (Thiobacillus jerrooxidans) to determine coating suitability for protecting storage tanks and reaction vessels. It was found that the polymers were resistant to chemical attack and biodegradation at the test temperature of 55°C. The EMAA coatings protected 3l6L stainless steel from corrosion in coupon tests. However, corrosion of mild steel substrates coated with EMAA and ETFE occurred in Atlas cell tests that simulated a lined reactor operating environment and this resulted in decreased adhesive strength. Peel tests revealed that failure mode was dependent on exposure conditions. Cathodic disbondment tests in brine at room temperature indicated that EMAA coatings are resistant to disbondment at applied potentials of -780 to -1070 mV SCE for the test conditions and duration.
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Green, Matthew A., Larry Deaton, and Christopher J. Lazzara. "Cathodic Disbondment Testing Comparison of Carbon Fiber, Fiberglass, and Hybrid Composite Repair Systems for Pipelines." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90318.

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Composite repair systems are being successfully and heavily utilized for the repair of a wide variety of pipeline systems operating at high internal pressures worldwide. Many of these pipelines employ cathodic protection systems as a preventative measure of insuring that the pipeline does not corrode. Even with advanced cathodic protection systems, there are still times that a pipeline may become damaged or corroded and composite repair systems are a popular choice. In order to qualify a composite repair system for use on a cathodically protected pipeline, the repair system must undergo specific testing to insure that there will be no issues of disbondment of the composite due to the cathodic protection system. This paper discusses the testing of composite repair systems with varying fiber types, resins, and installation methods. Results have been gathered for several repair system options and indicate that there is variance in the results depending on the above mentioned variables. The results of each of these systems and the impact of the fibers utilized will be discussed and conclusions made as to the effect of cathodic protection on each.
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Eslami, Abdoulmajid, Mohammadhassan Marvasti, Weixing Chen, Reg Eadie, Richard Kania, Robert Worthingham, and Greg Van Boven. "The Role of Electrochemical Conditions in Near-Neutral pH SCC Initiation Mechanism(s)." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31190.

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In order to improve our understanding of near-neutral pH SCC initiation mechanism(s), a comprehensive test setup was used to study the electrochemical conditions beneath the disbonded coatings in cracking environments. In this setup the synergistic effects of cyclic loading, coating disbondment, and cathodic protection were considered. Our previous results showed that there can be a significant variation in the pH of the localized environment under the disbonded coating of pipeline steel. The pH inside the disbondment can change significantly from near-neutral to high pH values, strongly depending on the level of cathodic protection and CO2 concentration. Both of these variables affected the electrochemical conditions on the steel surface and therefore the initiation mechanisms. This work highlights the role of electrochemical conditions in near-neutral pH SCC initiation mechanisms.
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