Characteristic and Mechanistic Investigation of Stress-Assisted Microbiologically Influenced Corrosion of X80 Steel in Near-Neutral Solutions

Huihua Guo; Rui Zhong; Bo Liu; Jike Yang; Zhiyong Liu; Cuiwei Du; Xiaogang Li

doi:10.3390/ma16010390

Characteristic and Mechanistic Investigation of Stress-Assisted Microbiologically Influenced Corrosion of X80 Steel in Near-Neutral Solutions

Materials (Basel). 2022 Dec 31;16(1):390. doi: 10.3390/ma16010390.

Authors

Huihua Guo¹, Rui Zhong², Bo Liu¹, Jike Yang¹, Zhiyong Liu^{1

3}, Cuiwei Du^{1

3

4}, Xiaogang Li^{1

3

4}

Affiliations

¹ Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
² Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China.
³ National Materials Corrosion and Protection Data Center, Beijing 100083, China.
⁴ Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Abstract

The behavior and mechanisms of the stress-assisted microbiologically influenced corrosion (MIC) of X80 pipeline steel induced by sulfate-reducing bacteria (SRB) were investigated using focused ion beam-scanning electron microscopy (FIB). Electrochemical results show that SRB and stress have a synergistic effect on the corrosion of X80 steel. SRB accelerated the transformation of Fe₃O₄ into iron-sulfur compounds and may have caused the film breakage of X80 steel products. The obtained FIB results provide direct evidence that SRB promotes the corrosion of X80 steel.

Keywords: FIB; MIC; SRB; X80.

Grants and funding

2018YFB0605502/the National Key RESEARCH and development Project of China