Effect of Localized Coating Damage on Stress Corrosion Cracking Resistance of API 5L Grade B Steel
Advances in Materials
Volume 6, Issue 4, August 2017, Pages: 45-51
Received: Jul. 28, 2017; Accepted: Aug. 10, 2017; Published: Aug. 28, 2017
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Author
Pejman Malekinejad, Department of Materials Science and Engineering, Kerman Graduate University of Technology, Kerman, Iran
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Abstract
In this research slow strain rate testing (SSRT), scanning electron microscopy (SEM), hardness measurement, metallography and optical microscopy were used to investigate the effect of localized coating damage on stress corrosion cracking (SCC) resistance of API 5L Grade B steel. According to the results, by increasing the damaged coating surface area, resistance to SCC increased. This phenomenon had 2 reasons. Firstly, by reduction of damaged surface area of coating, the ratio of anode surface to cathode surface reduced and consequently the corrosion reduced. Other reason was reduction in toughness by reducing the area of damaged surface of coating which resulted in failure at lower stresses.
Keywords
API 5L Grade B, SSRT, SEM, SCC
To cite this article
Pejman Malekinejad, Effect of Localized Coating Damage on Stress Corrosion Cracking Resistance of API 5L Grade B Steel, Advances in Materials. Vol. 6, No. 4, 2017, pp. 45-51. doi: 10.11648/j.am.20170604.13
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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