|
1
|
Hua W, Sun R, Wang X, Zhang Y, Li J, Qiu R, Gao Y. Corrosion of Q235 carbon steel induced by sulfate-reducing bacteria in groundwater: corrosion behavior, corrosion product, and microbial community structure. Environ Sci Pollut Res Int 2024; 31:4269-4279. [PMID: 38097840 DOI: 10.1007/s11356-023-31422-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 12/04/2023] [Indexed: 01/19/2024]
Abstract
Microbiologically influenced corrosion (MIC) is one of the reasons leading to the service failure of pipelines buried in the soil. In this work, the effect of sulfate-reducing bacteria (SRB) on the corrosion behavior of Q235 carbon steel in groundwater was investigated by electrochemical methods, surface analysis, and biological analysis. The results show that SRB utilizes iron as electron donor to sustain the vital activities of organic carbon-starved groundwater during the 14-day experimental period. The microbial community composition analysis at the genus level demonstrate that the diversity and richness decrease after corrosion, and the dominant SRB species has changed from Desulfovibrio to Desulfosporosinus. Moreover, the impedance of the carbon steel in the presence of biofilm was 1 order of magnitude higher than that of other periods in the electrochemical test, indicating that the biofilm and formed ferrous sulfide layer impeded the occurrence of corrosion. Although the 3D topography indicated that the surface of carbon steel was more uneven and pits were increased in the presence of SRB, the average weight loss (0.0396 ± 0.0050 g) was much higher than that without SRB (0.0139 ± 0.0007 g). These results implied that the growth of SRB makes the corrosion process of Q235 carbon steel more complicated.
Collapse
Affiliation(s)
- Wenxin Hua
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Rui Sun
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Xiaoyan Wang
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Yunyun Zhang
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Jiaxing Li
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Ri Qiu
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China
| | - Yu Gao
- College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China.
- Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity, Shandong University of Science and Technology, Shandong University of Science and Technology, Qingdao, 266510, China.
| |
Collapse
|