Print Email Facebook Twitter Adaptive bidirectional extracellular electron transfer during accelerated microbiologically influenced corrosion of stainless steel Title Adaptive bidirectional extracellular electron transfer during accelerated microbiologically influenced corrosion of stainless steel Author Li, Z. (TU Delft Team Arjan Mol; University of Science and Technology Beijing) Chang, Weiwei (University of Science and Technology Beijing) Cui, Tianyu (University of Science and Technology Beijing) Xu, Dake (Northeastern University) Zhang, Dawei (University of Science and Technology Beijing) Lou, Yuntian (University of Science and Technology Beijing) Qian, Hongchang (University of Science and Technology Beijing) Song, Hao (Tianjin University) Mol, J.M.C. (TU Delft Team Arjan Mol) Cao, Fahe (Sun Yat-sen University) Gu, Tingyue (Ohio University) Li, Xiaogang (University of Science and Technology Beijing) Date 2021 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. To reference this document use: http://resolver.tudelft.nl/uuid:7ac432b1-4446-4eeb-92e6-0e10168b0f6a DOI https://doi.org/10.1038/s43246-021-00173-8 ISSN 2662-4443 Source Communications Materials, 2 (1) Part of collection Institutional Repository Document type journal article Rights © 2021 Z. Li, Weiwei Chang, Tianyu Cui, Dake Xu, Dawei Zhang, Yuntian Lou, Hongchang Qian, Hao Song, J.M.C. Mol, Fahe Cao, Tingyue Gu, Xiaogang Li Files PDF s43246_021_00173_8.pdf 1.26 MB Close viewer /islandora/object/uuid:7ac432b1-4446-4eeb-92e6-0e10168b0f6a/datastream/OBJ/view