J. Mater. Sci. Technol. ›› 2021, Vol. 64: 176-186.DOI: 10.1016/j.jmst.2020.05.070

• Research Article • Previous Articles     Next Articles

Investigation of microbial corrosion inhibition of Cu-bearing 316L stainless steel in the presence of acid producing bacterium Acidithiobacillus caldus SM-1

Yuqiao Donga, Jiaqi Lib, Dake Xub,*(), Guangling Songa,*(), Dan Liuc, Haipeng Wanga, M.Saleem Khand, Ke Yange, Fuhui Wangb   

  1. aCenter for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen, 361005, China
    bShenyang National Laboratory for Materials Science, Northeastern University, Shenyang, 110819, China
    cSchool of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
    dShenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518000, China
    e Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
  • Received:2019-12-25 Accepted:2020-05-27 Published:2021-02-20 Online:2021-03-15
  • Contact: Dake Xu,Guangling Song
  • About author:*. E-mail addresses: xudake@mail.neu.edu.cn (D. Xu)

Abstract:

Stainless steel (SS) has unsatisfied corrosion resistance in many aggressive environments, particularly under a low pH condition in the bioleaching industry. In this study, through surface analyses and electrochemical measurements, the corrosion resistance of a novel Cu-bearing 316L SS was evaluated in the presence of an acid-producing bacterium, Acidithiobacillus caldus SM-1 that was able to create an extremely acidic corrosive environment. The significantly enhanced anti-microbiologically-induced-corrosion performance could be explained by the intracellular reactive oxygen species (ROS) and Fenton reaction on the Cu-bearing 316L SS.

Key words: Stainless steel, Acid-producing bacteria, Copper ion, Reactive oxygen species, Corrosion resistance