Severe microbiologically influenced corrosion of S32654 super austenitic stainless steel by acid producing bacterium Acidithiobacillus caldus SM-1

Yuqiao Dong; Baota Jiang; Dake Xu; Chengying Jiang; Qi Li; Tingyue Gu

doi:10.1016/j.bioelechem.2018.04.014

Severe microbiologically influenced corrosion of S32654 super austenitic stainless steel by acid producing bacterium Acidithiobacillus caldus SM-1

Bioelectrochemistry. 2018 Oct:123:34-44. doi: 10.1016/j.bioelechem.2018.04.014. Epub 2018 Apr 23.

Authors

Yuqiao Dong¹, Baota Jiang², Dake Xu³, Chengying Jiang², Qi Li⁴, Tingyue Gu⁵

Affiliations

¹ College of Chemistry, Liaoning University, Shenyang 110036, China.
² Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
³ Corrosion and Protection Division, Shenyang National Laboratory for Material Sciences, Northeastern University, Shenyang 110819, China; Northeastern Institute of Metal Materials Co., Ltd，Shenyang 110108, China. Electronic address: xudake@mail.neu.edu.cn.
⁴ College of Chemistry, Liaoning University, Shenyang 110036, China. Electronic address: zyz91@sohu.com.
⁵ Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH 45701, USA.

PMID: 29723805
DOI: 10.1016/j.bioelechem.2018.04.014

Abstract

Microbiologically influenced corrosion (MIC) of S32654 (654SMO) super austenitic stainless steel (SASS) by acid producing bacterium (APB), Acidithiobacillus caldus SM-1, a strain of sulfur-oxidizing bacteria (SOB) used in biohydrometallurgy field, was investigated using electrochemical measurements and surface characterizations during a 14-day immersion test. The results indicated that S32654 SASS was susceptible to MIC by APB, and A. caldus SM-1 was capable of producing an aggressive acidic environment underneath the biofilm, resulting in the dissolution of the passive film and severe pitting attacks against S32654 SASS, which is commonly regarded as a corrosion resistant material.

Keywords: EIS; Microbiological corrosion; Pitting corrosion; S32654 super austenitic stainless steel.

MeSH terms

Acidithiobacillus / chemistry
Acidithiobacillus / physiology*
Biofilms
Corrosion
Electrochemical Techniques
Stainless Steel / chemistry*
Sulfuric Acids / chemistry
Sulfuric Acids / metabolism*
Surface Properties

Substances

Sulfuric Acids
Stainless Steel
sulfuric acid