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

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