Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 11, Issue 3, Pages 568-571Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.12.019
Keywords
Microbial corrosion; Geobacter sulfurreducens; Direct electron transfer; 304 L stainless steel
Categories
Funding
- CNRS-DRI
- CNRS
Ask authors/readers for more resources
It has recently been discovered that many microbial species have the capacity to connect their metabolism to solid electrodes, directly exchanging electrons with them through membrane-bound redox compounds, nevertheless such a direct electron transfer pathway has been evoked rarely in the domain of microbial corrosion. Here was evidenced for the first time that the bacterium Geobacter sulfurreducens is able to increase the free potential of 304 L stainless steel up to 443 mV in only a Few hours, which represents a drastic increase in the corrosion risk. In contrast, when the bacterial cells form a locally well-established biofilm, pitting potentials were delayed towards positive values. The microscopy pictures confirmed an intimate correlation between the zones where pitting occurred and the local settlement of cells. Geobacter species must now be considered as key players in the mechanisms of corrosion. (C) 2008 Elsevier B.V. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available