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Adaptive bidirectional extracellular electron transfer during accelerated microbiologically influenced corrosion of stainless steel

Journal Article (2021)
Author(s)

Ziyu Li (University of Science and Technology Beijing, TU Delft - Team Arjan Mol)

Weiwei Chang (University of Science and Technology Beijing)

Tianyu Cui (University of Science and Technology Beijing)

Dake Xu (Northeastern University China)

Dawei Zhang (University of Science and Technology Beijing)

Yuntian Lou (University of Science and Technology Beijing)

Hongchang Qian (University of Science and Technology Beijing)

Hao Song (Tianjin University)

Arjan Mol (TU Delft - Team Arjan Mol)

Fahe Cao (Sun Yat-sen University)

Tingyue Gu (Ohio University)

Xiaogang Li (University of Science and Technology Beijing)

Research Group
Team Arjan Mol
DOI related publication
https://doi.org/10.1038/s43246-021-00173-8
More Info
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Publication Year
2021
Language
English
Research Group
Team Arjan Mol
Issue number
1
Volume number
2
Article number
67
Downloads counter
399
Collections
Institutional Repository
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Abstract

Microbiologically influenced corrosion of metals is prevalent in both natural and industrial environments, causing enormous structural damage and economic loss. Exactly how microbes influence corrosion remains controversial. Here, we show that the pitting corrosion of stainless steel is accelerated in the presence of Shewanella oneidensis MR-1 biofilm by extracellular electron transfer between the bacterial cells and the steel electrode, mediated by a riboflavin electron shuttle. From pitting measurements, X-ray photoelectron spectroscopy and Mott-Schottky analyses, the addition of an increased amount of riboflavin is found to induce a more defective passive film on the stainless steel. Electrochemical impedance spectroscopy reveals that enhanced bioanodic and biocathodic process can both promote the corrosion of the stainless steel. Using in situ scanning electrochemical microscopy, we observe that extracellular electron transfer between the bacterium and the stainless steel is bidirectional in nature and switchable depending on the passive or active state of the steel surface.