TY - JOUR
T1 - Effect of alternating current on stress corrosion cracking behavior and mechanism of X80 pipeline steel in near-neutral solution
AU - Wan, Hongxia
AU - Song, Dongdong
AU - Liu, Zhiyong
AU - Du, Cuiwei
AU - Zeng, Zhongping
AU - Yang, Xiaojia
AU - Li, Xiaogang
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - The influence of alternating current (AC) density on stress corrosion cracking (SCC)behavior and the mechanism of X80 pipeline steel was investigated in NS4 near-neutral solution by slow strain rate tensile tests (SSRT), surface analysis techniques, data acquisition technique, and electrochemical measurements. Results showed that the SCC susceptibility of X80 pipeline steel was improved with the increasing of AC density, and the SCC mechanism was collectively controlled by anodic dissolution (AD) and hydrogen embrittlement (HE). When the AC density was below 10 A m−2, the corrosion enhanced because of a vibrating effect. However, when the AC density was no less than 30 A m−2, SCC susceptibility enhanced because of the hydrogen evolution reaction. With regard to potential acquisition, only a very small percentage about 1.5%–2% of AC was involved acting as faradaic current, which resulted in hydrogen evolution reaction and then improved the SCC susceptibility.
AB - The influence of alternating current (AC) density on stress corrosion cracking (SCC)behavior and the mechanism of X80 pipeline steel was investigated in NS4 near-neutral solution by slow strain rate tensile tests (SSRT), surface analysis techniques, data acquisition technique, and electrochemical measurements. Results showed that the SCC susceptibility of X80 pipeline steel was improved with the increasing of AC density, and the SCC mechanism was collectively controlled by anodic dissolution (AD) and hydrogen embrittlement (HE). When the AC density was below 10 A m−2, the corrosion enhanced because of a vibrating effect. However, when the AC density was no less than 30 A m−2, SCC susceptibility enhanced because of the hydrogen evolution reaction. With regard to potential acquisition, only a very small percentage about 1.5%–2% of AC was involved acting as faradaic current, which resulted in hydrogen evolution reaction and then improved the SCC susceptibility.
KW - Alternating current
KW - Near-neutral environment
KW - Pipeline steel
KW - Stress corrosion
UR - https://www.scopus.com/pages/publications/85009128765
U2 - 10.1016/j.jngse.2017.01.008
DO - 10.1016/j.jngse.2017.01.008
M3 - 文章
AN - SCOPUS:85009128765
SN - 1875-5100
VL - 38
SP - 458
EP - 465
JO - Journal of Natural Gas Science and Engineering
JF - Journal of Natural Gas Science and Engineering
ER -