中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 6 June 2025 |
（1. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China;
2. School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411105, China）
Abstract:The sulfate-reducing bacteria (SRB) corrosion of H70 brass, H80 brass and T2 copper was systematically studied using microstructure characterizations and electrochemical measurements. The results showed that H70 brass, H80 brass and T2 copper exhibited good corrosion resistance in the sterile environment, and the corrosion products were mainly metal oxides, such as Cu2O, CuO and ZnO. The SRB metabolism sharply accelerated the corrosion process of three types of copper alloys, especially the T2 copper. In the inoculated environment, an additional mixture of Cu2S, ZnS and CuSO4 existed in the corrosion products. Pitting corrosion was the main corrosion style for the H70 brass and H80 brass, while general corrosion and pitting corrosion simultaneously dominated the corrosion process of the T2 copper in this environment. The results provide a new insight to the microbiological corrosion of copper alloys.
Key words: copper; brass; sulfate reducing bacteria; microbiologically influenced corrosion; microstructure
