Effect of sulfate-reducing bacteria on hydrogen permeation and stress corrosion cracking behavior of 980 high-strength steel in seawater

被引：37
作者：
Lv, Meiying [1 ]
Chen, Xuchao [1 ]
Li, Zhenxin [1 ]
Du, Min [1 ]
机构：
[1] Ocean Univ China, Coll Chem & Chem Engn, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 92卷
基金：
中国国家自然科学基金;
关键词：
Stress corrosion cracking; Sulfate-reducing bacteria; Microbiologically influenced corrosion; 980 High-strength steel; Seawater; X80 PIPELINE STEEL; MICROBIOLOGICALLY INFLUENCED CORROSION; CARBON-STEEL; LOW-ALLOY; IRON; EMBRITTLEMENT; MECHANISM; DEFECTS; BIOFILM; CO2;
D O I：
10.1016/j.jmst.2021.02.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
980 high-strength steel has been widely used in marine engineering structures due to its high strength and toughness. However, it is easily affected by the harsh environmental conditions (such as the presence of sulfate-reducing bacteria, SRB), leading to the risk of stress corrosion cracking (SCC). In this paper, the effects of SRB and its metabolites on hydrogen permeation and SCC mechanism of 980 steel in seawater solution were investigated by slow strain rate tensile test, scanning electron microscope, Xray energy spectroscopy, Raman spectroscopy and Devanathan-Stachurski double electrolytic cell. Results demonstrated that the SCC susceptibility of 980 steel was promoted in the presence of SRB, which was related to the cultivation time of the bacteria. When SRB were cultivated for 3 d and 6 d, the SCC mechanism was controlled by hydrogen-induced cracking (HIC); while the cultivation time extended to 11 d, the SCC of 980 steel was under the combined effect of the anodic dissolution (AD) and HIC mechanism. When cultivated for 16 d, the SCC of 980 steel was caused by the dominant AD. Both the SRB accelerated hydrogen permeation under cathodic depolarization process and SRB assisted AD (pitting corrosion) played an enhancing role in promoting SCC susceptibility of 980 steel. (C) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals.
引用
收藏
页码：109 / 119
页数：11
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