Influence of Sulfate-Reducing Bacteria on Corrosion Behavior of EQ70 High-Strength Steel

被引：3

作者：

Song, Yanyan ^{[1
,2
,3
]}

Shi, Hongwei ^{[1
,3
]}

Nwokolo, Izuchukwu K. ^{[3
,4
]}

Wu, Bin ^{[1
]}

Gao, Shitian ^{[1
]}

Cheng, Huize ^{[1
]}

Wang, Jun ^{[2
]}

机构：

[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China

[2] Northeastern Univ, Dept Chem, Shenyang 110004, Peoples R China

[3] Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China

[4] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China

来源：

METALS | 2023年 / 13卷 / 10期

基金：

中国国家自然科学基金;

关键词：

sulfate-reducing bacteria; microbiologically influenced corrosion; high-strength steel; SEM; EIS; MICROBIOLOGICALLY INFLUENCED CORROSION; CARBON-STEEL; MICROBIAL CORROSION; MECHANISM; SEAWATER; 304-STAINLESS-STEEL; IMPACT; SRB;

D O I：

10.3390/met13101695

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work examines corrosion behavior of EQ70 high-strength steel under anaerobic conditions in artificial seawater containing sulfate-reducing bacteria (SRB). Polarization and electrochemical impedance spectra (EIS) tests were conducted. The results reveal that corrosion rate initially decreased at the beginning of immersion. However, as the immersion time progressed, the corrosion rate of the high-strength steel increased, attributed to SRB reproduction. The scanning electron microscopy (SEM) results demonstrate that the corrosion was more severe in artificial seawater containing SRB compared to that of seawater without SRB. The morphologies of confocal laser scanning microscopy (CLSM) demonstrate that, after 15 days of immersion, the average depth of the corrosion pits on the sample in the artificial seawater containing SRB was nearly double that of the sample in the SRB-free seawater.

引用

页数：13

共 43 条

[1] Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5 wt.% NaCl media [J].