期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.09.033
关键词
Pipeline steel; Plastic deformation; Electrochemical; Hydrogen absorption; Stress corrosion cracking
类别
资金
- National Natural Science Foundation of China [51471034, 51131001]
- National Basic Research Program of China (973 Program) [2014CB643300]
This work investigated the effect of plastic deformation on the electrochemical and stress corrosion cracking (SCC) behavior of X70 steel in near-neutral pH environment. The deformation-induced increase in electrochemical activity, dislocation density and heterogeneity, and surface roughness accelerated the corrosion, especially the cathodic reactions. Hydrogen absorption and permeation into the steel is promoted by the plastic deformation, resulting in the high hydrogen content of the pre-deformed steels. Moreover, the SCC susceptibility increases with plastic elongation, which is attributed to the enhanced anodic dissolution and hydrogen absorption. (C) 2016 Elsevier B.V. All rights reserved.
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