Acceleration of corrosion of 304 stainless steel by outward extracellular electron transfer of Pseudomonas aeruginosa biofilm

Journal article (2022)

Authors

Luyao Huang University of Science and Technology Beijing, Global Energy Interconnection Research Institute Co., Ltd.
Weiwei Chang University of Science and Technology Beijing
Dawei Zhang University of Science and Technology Beijing
Ye Huang Chinese Academy of Sciences
Z. Li Team Arjan Mol - Mechanical, Maritime and Materials Engineering
Yuntian Lou University of Science and Technology Beijing
Hongchang Qian University of Science and Technology Beijing
Chengying Jiang Chinese Academy of Sciences
Xiaogang Li University of Science and Technology Beijing
J.M.C. Mol Team Arjan Mol - Mechanical, Maritime and Materials Engineering
Research Group
Team Arjan Mol (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 Luyao Huang, Weiwei Chang, Dawei Zhang, Ye Huang, Z. Li, Yuntian Lou, Hongchang Qian, Chengying Jiang, Xiaogang Li, J.M.C. Mol
DOI: https://doi.org/10.1016/j.corsci.2022.110159
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Published Date

2022

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Arjan Mol

Abstract

The influence of outward extracellular electron transfer (EET) of Pseudomonas aeruginosa in accelerating corrosion of 304 stainless steel was investigated. With less NO3− available as electron acceptor, P. aeruginosa biofilm accelerated the pitting corrosion. The ICP-MS and XPS results indicated that P. aeruginosa promoted the bioreductive dissolution of iron oxides in the passive film of stainless steel. Using in situ scanning electrochemical microscopy, we established a relationship between this accelerated deterioration of the passive film and the EET process mediated by the conversion of the redox states of pyocyanin secreted by P. aeruginosa.

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