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Article: Microbiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawater

TitleMicrobiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawater
Authors
KeywordsChemistry
Electrochemistry
Issue Date2004
PublisherElectrochemical Society, Inc. The Journal's web site is located at http://ojps.aip.org/JES
Citation
Journal Of The Electrochemical Society, 2004, v. 151 n. 7, p. B434-B439 How to Cite?
AbstractThe corrosion of 70Cu-30Ni alloy induced by sulfate-reducing bacteria (SRB) in seawater was investigated by microscopic and electrochemical methods. Under anaerobic conditions, the SRB attached on the alloy surface formed blotchy biofilms, as observed by confocal laser scanning microscopy. Intergranular corrosion of the alloy occurred after immersion in SRB-containing seawater for 7 days, as observed by atomic force and scanning electron microscopy. Compared to the control experiment in the absence of SRB, a 330 mV shift of open-circuit potential resulted in the active direction and the polarization resistance decreased by a factor of 10. Electrochemical impedance spectroscopy data revealed that the impedance had remarkable capacitive characteristics. The response of the impedance was determined by two time constants for both the media with and without SRB. Analyses of concentrations of bacteria, metabolites, Cu, and Ni showed that the variation of concentrations of metabolites coincided with the growth of bacteria, and copper and nickel precipitated due to the production of metal sulfide, The effect of bacteria growth was the precipitation of cuprous sulfide to lower the potential of the anodic reaction and the reduction of hydrogen sulfide as the possible cathodic reaction. © 2004 The Electrochemical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/44616
ISSN
2015 Impact Factor: 3.014
2015 SCImago Journal Rankings: 1.157
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, Gen_HK
dc.contributor.authorChan, KYen_HK
dc.contributor.authorFang, HHPen_HK
dc.date.accessioned2007-10-30T06:05:50Z-
dc.date.available2007-10-30T06:05:50Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of The Electrochemical Society, 2004, v. 151 n. 7, p. B434-B439en_HK
dc.identifier.issn0013-4651en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44616-
dc.description.abstractThe corrosion of 70Cu-30Ni alloy induced by sulfate-reducing bacteria (SRB) in seawater was investigated by microscopic and electrochemical methods. Under anaerobic conditions, the SRB attached on the alloy surface formed blotchy biofilms, as observed by confocal laser scanning microscopy. Intergranular corrosion of the alloy occurred after immersion in SRB-containing seawater for 7 days, as observed by atomic force and scanning electron microscopy. Compared to the control experiment in the absence of SRB, a 330 mV shift of open-circuit potential resulted in the active direction and the polarization resistance decreased by a factor of 10. Electrochemical impedance spectroscopy data revealed that the impedance had remarkable capacitive characteristics. The response of the impedance was determined by two time constants for both the media with and without SRB. Analyses of concentrations of bacteria, metabolites, Cu, and Ni showed that the variation of concentrations of metabolites coincided with the growth of bacteria, and copper and nickel precipitated due to the production of metal sulfide, The effect of bacteria growth was the precipitation of cuprous sulfide to lower the potential of the anodic reaction and the reduction of hydrogen sulfide as the possible cathodic reaction. © 2004 The Electrochemical Society. All rights reserved.en_HK
dc.format.extent11469165 bytes-
dc.format.extent465031 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/pdf-
dc.languageengen_HK
dc.publisherElectrochemical Society, Inc. The Journal's web site is located at http://ojps.aip.org/JESen_HK
dc.relation.ispartofJournal of the Electrochemical Societyen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsJournal of Electrochemical Society. Copyright © Electrochemical Society, Inc.en_HK
dc.rightsReproduced with permission from Journal of Electrochemical Society, 2004, v. 151 n. 7, p. B434-B439. Copyright 2004, The Electrochemical Society. Permission is not needed if figures and/or tables from one ECS publication will be reused in another forthcoming ECS publicationen_HK
dc.subjectChemistryen_HK
dc.subjectElectrochemistryen_HK
dc.titleMicrobiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawateren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0013-4651&volume=151&issue=7&spage=B434&epage=B439&date=2004&atitle=Microbiologically+induced+corrosion+of+70Cu-30Ni+Alloy+in+Anaerobic+Seawateren_HK
dc.identifier.emailChan, KY:hrsccky@hku.hken_HK
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_HK
dc.identifier.authorityChan, KY=rp00662en_HK
dc.identifier.authorityFang, HHP=rp00115en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1149/1.1756153en_HK
dc.identifier.scopuseid_2-s2.0-3242740492en_HK
dc.identifier.hkuros93247-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-3242740492&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume151en_HK
dc.identifier.issue7en_HK
dc.identifier.spageB434en_HK
dc.identifier.epageB439en_HK
dc.identifier.isiWOS:000222676300033-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHuang, G=9247555100en_HK
dc.identifier.scopusauthoridChan, KY=7406034142en_HK
dc.identifier.scopusauthoridFang, HHP=7402542625en_HK

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