期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 147, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2019.104872
关键词
Acid-producing bacteria; Carbon steel; Microbiological corrosion; Biofilm formation; Fe3O4
资金
- National Natural Science Foundation of China (NSFC) [51422507]
- China Postdoctoral Science Foundation [2017M622542]
- Hubei Postdoctoral Sustentation Foundation, China [G22]
Acid-producing bacteria, which can induce variation in pH, play a key role in microbiologically influenced corrosion (MIC). In this study, the corrosion behavior of Q235 carbon steel was investigated in the presence of acid-producing bacterium Citrobacter farmeri. During the initial stage of bacterial adhesion, formation of inhomogeneous biofilm of C. farmeri produced differential aeration cells, resulting in the formation of tiny crevices on the carbon steel. After 168 h incubation, a thick biofilm of C. farmeri formed on the carbon steel, which accelerated the corrosion process and produced an inner layer of Fe3O4. The results suggested that the corrosion behavior of carbon steel in the presence of C. farmeri was determined by the formation of thick biofilm and conductive Fe3O4 film.
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