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Journal of Materials Engineering and Performance

Erschienen in:

14.09.2015

Effect of pH Value on the Electrochemical and Stress Corrosion Cracking Behavior of X70 Pipeline Steel in the Dilute Bicarbonate Solutions

verfasst von: Z. Y. Cui, Z. Y. Liu, L. W. Wang, H. C. Ma, C. W. Du, X. G. Li, X. Wang

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 11/2015

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Abstract

In this work, effects of pH value on the electrochemical and stress corrosion cracking (SCC) behavior of X70 pipeline steel in the dilute bicarbonate solutions were investigated using electrochemical measurements, slow strain rate tensile tests and surface analysis techniques. Decrease of the solution pH from 6.8 to 6.0 promotes the anodic dissolution and cathodic reduction simultaneously. Further decrease of the pH value mainly accelerates the cathodic reduction of X70 pipeline steel. As a result, when the solution pH decreases form 6.8 to 5.5, SCC susceptibility decreases because of the enhancement of the anodic dissolution. When the solution pH decreases from 5.5 to 4.0, SCC susceptibility increases gradually because of the acceleration of cathodic reactions.

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Titel: Effect of pH Value on the Electrochemical and Stress Corrosion Cracking Behavior of X70 Pipeline Steel in the Dilute Bicarbonate Solutions
verfasst von: Z. Y. Cui
Z. Y. Liu
L. W. Wang
H. C. Ma
C. W. Du
X. G. Li
X. Wang
Publikationsdatum: 14.09.2015
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 11/2015
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-015-1697-5

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