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dc.contributor.authorMehanna, M.
dc.contributor.authorBasseguy, R.
dc.contributor.authorDelia, M.
dc.contributor.authorGubner, Rolf
dc.contributor.authorSathirachinda, N.
dc.contributor.authorBergel, A.
dc.date.accessioned2017-01-30T11:09:16Z
dc.date.available2017-01-30T11:09:16Z
dc.date.created2014-10-08T02:29:18Z
dc.date.issued2009
dc.date.submitted2014-10-08
dc.identifier.citationMehanna, M. and Basseguy, R. and Delia, M. and Gubner, R. and Sathirachinda, N. and Bergel, A. 2009. Geobacter species enhances pit depth on 304L stainless steel in a medium lacking with electron donor. Electrochemistry Communications. 11 (7): pp. 1476-1481.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/8883
dc.description.abstract

Geobacter sulfurreducens bacteria increased the open circuit potential of 304L stainless steel by around 320 mV in only a few hours after inoculation. This represents a significant increase in the corrosion risk. In contrast, the oxidation of acetate, which is catalysed by well-established biofilms, shifted the pitting potential towards positive values. In acetate-lacking media, pitting occurred with and without bacteria in the same range of potential values, but the presence of bacteria drastically increased the size of pits. AFM showed pits more than 10 times broader and deeper due to the presence of bacteria.In the absence of acetate, the masking effect due to acetate oxidation disappeared and the full corrosive effect of the biofilm was revealed.This also Fully explains why pitting was predominantly observed close to surface areas where bacterial settlement was the densest.

dc.publisherElsevier
dc.subjectStainless steel
dc.subjectMicrobial corrosion
dc.subjectDirect electron transfer
dc.subjectGeobacter sulfurreducens
dc.subjectElectrochemically active biofilms
dc.titleGeobacter species enhances pit depth on 304L stainless steel in a medium lacking with electron donor
dc.typeJournal Article
dcterms.dateSubmitted2014-10-08
dcterms.source.volume11
dcterms.source.number7
dcterms.source.startPage1476
dcterms.source.endPage1481
dcterms.source.issn13882481
dcterms.source.titleElectrochemistry Communications
curtin.digitool.pid201343
curtin.digitool.pid201344
curtin.pubStatusPublished
curtin.identifier.scriptidPUB-SE-DAC-TMC-51130
curtin.accessStatusFulltext not available


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