Electrochemical studies of microbiologically influenced corrosion of X80 steel by nitrate-reducing Bacillus licheniformis under anaerobic conditions

作     者：Jun Li Cuiwei Du Zhiyong Liu Xiaogang Li Jun Li;Cuiwei Du;Zhiyong Liu;Xiaogang Li

作者机构：School of Materials Science and EngineeringChang’an UniversityXi’an 710064China Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Corrosion and Protection of the Ministry of Education(MOE)Beijing 100083China Beijing Advanced Innovation Center for Materials Genome EngineeringUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第118卷第23期

页      面：208-217页

核心收录：

学科分类：0710[理学-生物学] 080503[工学-材料加工工程] 1003[医学-口腔医学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0836[工学-生物工程] 

基　　金：financially supported by the National Natural Science Foundation of China (No. 51871026) the National Key R&D Program of China (No. 2017YFF0210404) 

主　　题：Microbiologically influenced corrosion X80 steel Nitrate-reducing bacteria Electrochemical tests Biofilm characterization 

摘      要：In this work, the impact of a wild-type nitrate-reducing Bacillus licheniformis strain on the corrosion behavior of X80 steel under anaerobic conditions was studied by electrochemical tests and biofilm characterization. The bioelectrochemical, electrochemical, and chemical reactions between X80 steel and microorganisms were investigated comprehensively. The results show that B. licheniformis can accelerate the corrosion of X80 steel substrate in early immersing by two ways: biocatalytic cathodic nitrate reduction and acidification induced by bacterially-secreted acids. However, the corrosion rate of X80 steel decreased after immersing for ca. 1 week in B. licheniformis culture due to iron biomineralization. This work provides direct insights into the mechanism of microbiologically influenced corrosion of carbon steel by the nitrate-reducing bacterium.