Mechanistic aspect of near-neutral pH stress corrosion cracking of pipelines under cathodic polarization
作者： ZY Liu , XG Li , YF Cheng , None
DOI: 10.1016/J.CORSCI.2011.10.002
关键词:
摘要: Abstract This paper investigates mechanistically stress corrosion cracking (SCC) of an X70 pipeline steel that is under cathodic protection (CP) in a near-neutral pH solution. It was found there critical potential range, i.e., −730 and −920 mVSCE, where the non-equilibrium electrochemical state, anodic dissolution (AD) reaction may occur when polarized cathodically. When applied more positive than this SCC AD-based; while negative, pipelines hydrogen embrittlement (HE) mechanism. polarization within combined effect AD HE. Therefore, still on CP with contributing to process.
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