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You searched for subject:(Cathodic Disbondment). Showing records 1 – 3 of 3 total matches.

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University of Toronto

1. Masoudi, Rana Jr. Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions.

Degree: 2013, University of Toronto

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.

MAST

Advisors/Committee Members: Hooton, Robert Douglas, Civil Engineering.

Subjects/Keywords: adhesion; Epoxy; Cathodic Disbondment; pH; Alkaline; Disbondment; 0543

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APA (6th Edition):

Masoudi, R. J. (2013). Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/43192

Chicago Manual of Style (16th Edition):

Masoudi, Rana Jr. “Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions.” 2013. Masters Thesis, University of Toronto. Accessed June 19, 2019. http://hdl.handle.net/1807/43192.

MLA Handbook (7th Edition):

Masoudi, Rana Jr. “Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions.” 2013. Web. 19 Jun 2019.

Vancouver:

Masoudi RJ. Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/1807/43192.

Council of Science Editors:

Masoudi RJ. Adhesion of Epoxy Coating to Steel Reinforcement under Alkaline Conditions. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/43192


Deakin University

2. Mahdavi, Fariba. Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques.

Degree: 2017, Deakin University

A new approach based on the electrochemical techniques has been developed in this research to measure the cathodic disbondment of coatings as a frequently reported failure mode of oil and gas pipeline coatings. The technique has been employed to build up a deeper knowledge on the cathodic disbondment and to understand the environmental and physicochemical factors affecting the phenomenon. Advisors/Committee Members: Tan, Mike Yongjun, Forsyth, Maria.

Subjects/Keywords: pipeline coatings; cathodic disbondment; electrochemical impedance spectroscopy (EIS)

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APA (6th Edition):

Mahdavi, F. (2017). Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques. (Thesis). Deakin University. Retrieved from http://hdl.handle.net/10536/DRO/DU:30103224

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Mahdavi, Fariba. “Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques.” 2017. Thesis, Deakin University. Accessed June 19, 2019. http://hdl.handle.net/10536/DRO/DU:30103224.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Mahdavi, Fariba. “Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques.” 2017. Web. 19 Jun 2019.

Vancouver:

Mahdavi F. Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques. [Internet] [Thesis]. Deakin University; 2017. [cited 2019 Jun 19]. Available from: http://hdl.handle.net/10536/DRO/DU:30103224.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mahdavi F. Measuring and understanding the cathodic disbondment of organic coatings using electrochemical techniques. [Thesis]. Deakin University; 2017. Available from: http://hdl.handle.net/10536/DRO/DU:30103224

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Alberta

3. Eslami, Abdoulmajid. Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment.

Degree: PhD, Department of Chemical and Materials Engineering, 2012, University of Alberta

This research is aimed at understanding near-neutral pH SCC initiation under disbonded coatings of pipeline steels, and the effect of different environmental and operational factors on crack initiation. Understanding near-neutral pH stress corrosion cracking (SCC) could answer many of the primary questions on crack initiation of SCC which have not yet been answered. It could also assist the development of effective mitigative measures dealing with thousands of kilometer of pipelines containing this form of cracking, in addition to preventive action for future pipeline installations. Near-neutral pH SCC usually occurs under polyethylene tape (PE tape) coated pipelines, at locations where the coating becomes disbonded and/or damaged. Ground water can then penetrate under the damaged/disbonded coating, become trapped and form a suitable environment for corrosion and cracking. Despite extensive studies on this topic the details of crack initiation mechanisms in addition to the exact role of environmental and operational factors on crack initiation are not thoroughly understood. Most previous laboratory tests have been done in aggressive loading conditions and ignored the effect of coatings and cathodic protections (CP). In order to simulate the conditions responsible for crack initiation, a novel testing setup capable of simulating the synergistic effects of coating disbondment, cathodic protection and cyclic loading was implemented. Using this setup and long term laboratory tests near-neutral pH SCC initiation mechanisms and the effect of some environmental and operational factors on crack initiation were investigated. It was found that near-neutral pH SCC initiation does not necessarily occur in near-neutral pH environments as commonly believed. Depending on the level of CP and CO2 in the underground environment, different localized environments with varying pH values from near-neutral to high values above 10 can form under the disbonded coatings. This significantly affected the corrosion and near-neutral pH SCC initiation mechanisms. These investigations brought out new findings about the effect of environment and operations on near-neutral pH SCC initiation.

Subjects/Keywords: Coating Disbondment; Cathodic Protection; Pitting Corrosion; Near-neutral pH Stress Corrosion Cracking; Pipeline Steel

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APA (6th Edition):

Eslami, A. (2012). Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/k06988463

Chicago Manual of Style (16th Edition):

Eslami, Abdoulmajid. “Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment.” 2012. Doctoral Dissertation, University of Alberta. Accessed June 19, 2019. https://era.library.ualberta.ca/files/k06988463.

MLA Handbook (7th Edition):

Eslami, Abdoulmajid. “Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment.” 2012. Web. 19 Jun 2019.

Vancouver:

Eslami A. Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment. [Internet] [Doctoral dissertation]. University of Alberta; 2012. [cited 2019 Jun 19]. Available from: https://era.library.ualberta.ca/files/k06988463.

Council of Science Editors:

Eslami A. Near-neutral pH Stress Corrosion Crack Initiaion under Simulated Coating Disbondment. [Doctoral Dissertation]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/k06988463

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