Journal
CORROSION SCIENCE
Volume 98, Issue -, Pages 354-365Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.05.043
Keywords
Steel; Iron; Microbial corrosion; Sulphate reducing bacteria; Acetogen
Funding
- CSIRO Water for a Healthy Country Flagship
- University of Western Australia
- CSIRO OCE Post Doctoral Fellowship scheme
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Natural microbial communities were grown anaerobically with steel as the electron source and CO2 the electron acceptor and carbon source, without organic carbon and typical electron acceptors. The cultures increased corrosion by up to 45.5% compared to sterile controls in two months. Pyrosequencing showed the presence of sulphate reducing bacteria (SRB), sulphur reducing bacteria ((SRB)-R-0) and acetogens likely growing in a syntrophic relationship where SRB extracted electrons from iron, acetogens accepted electrons and reduced CO2 to acetate, which served as carbon source for SRB and/or (SRB)-R-0. The SRB Desulfovibrio mexicanus comprised up to 90.1% of the community. (C) 2015 Elsevier Ltd. All rights reserved.
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