Influence of a dual-species biofilm on the corrosion of mild steel
Abstract
The effect of a dual-species biofilm on the corrosion of carbon steel was examined using two bacterial species: the iron-reducer, Shewanella oneidensis (MR-1), and the sulfate-reducer, Desulfovibrio desulfuricans (G20). These experiments exploit the fact that the products of their metabolism (ferrous iron or sulfide) affect the corrosion rate of carbon steel in opposite ways. Electrochemical impedance spectroscopy (EIS) shows that over a short time period, co-cultures of MR-1 and G20 protect steel from corrosion. The fact that an iron-reducing bacterium can inhibit corrosion when a corrosion-enhancing bacterium is present warrants future study with respect to its potential applicability to the design of biological corrosion-control measures.
Additional Information
© 2005 Elsevier Ltd. Received 7 September 2003; accepted 6 November 2004. Available online 8 March 2005. We thank Davin Malasarn for help with the environmental isolates, Susanne Douglas at the Jet Propulsion Laboratory for help with ESEM, Florian Mansfeld and Stan Hsu for their assistance with EIS, and members of the Newman lab for useful discussions. This material is based upon work supported by the National Science Foundation under a grant awarded in 2001 to AKL, and by grants from the Office of Naval Research and the Luce Foundation to DKN.Additional details
- Eprint ID
- 37725
- DOI
- 10.1016/j.corsci.2004.11.013
- Resolver ID
- CaltechAUTHORS:20130402-132103393
- NSF
- Office of Naval Research (ONR)
- Luce Foundation
- Created
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2013-04-04Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences