Accelerated cathodic reaction in microbial corrosion of iron due to direct electron uptake by sulfate-reducing bacteria
By H. Venzlaff, D. Enning, J. Srinivasan, K. Mayrhofer, Achim Walter Hassel, F. Widdel, M. Stratmann. 2013
459 citations recorded by the source corpus.
Microbially influenced iron corrosion by sulfate-reducing bacteria (SRB) is conventionally attributed to the chemical corrosiveness of H2S, facilitated abiotic H+-reduction at deposited FeS, and biological consumption of chemically formed (‘cathodic’) H2. However, recent studies with corrosive SRB indicated direct consumption of iron-derived electrons rather than of H2 as a crucial mechanism. Here, we conducted potentiodynamic measurements with iron electrodes colonized by corrosive SRB. They significantly stimulated the cathodic reaction, while non-corrosive yet H2-consuming control SRB had no effect. Inactivation of the colonizing bacteria significantly reduced current stimulation, thus confirming biological catalysis rather than an abiotic cathodic effect of FeS.
Subfields: Biomedical Engineering, Environmental Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/6b0070123f18bd949f25633e9280edf8fa6303b5
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In Environmental Engineering
In Materials Chemistry
Citations in the corpus
- Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem (2013, background): “Two of the isolates, Desulfovibrio ferrophilus and Desulfopila corrodens, have been key in the recent investigations of this new type of microbe-metal interaction (12, 39, 60, 86).”