Investigation of microbial corrosion inhibition of Cu-bearing 316L stainless steel in the presence of acid producing bacterium Acidithiobacillus caldus SM-1
By Dong, Yuqiao; Li, Jiaqi; Xu, Dake; Song, Guangling; Liu, Dan; Wang, Haipeng; Khan, M. Saleem; Yang, Ke; Wang, Fuhui
Published in Journal of Materials Science & Technology
Journal of Materials Science & Technology
2020
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.