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Article: Microbiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawater
Title | Microbiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawater |
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Authors | |
Keywords | Chemistry Electrochemistry |
Issue Date | 2004 |
Publisher | Electrochemical 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/44616 |
ISSN | 2023 Impact Factor: 3.1 2023 SCImago Journal Rankings: 0.868 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Huang, G | en_HK |
dc.contributor.author | Chan, KY | en_HK |
dc.contributor.author | Fang, HHP | en_HK |
dc.date.accessioned | 2007-10-30T06:05:50Z | - |
dc.date.available | 2007-10-30T06:05:50Z | - |
dc.date.issued | 2004 | en_HK |
dc.identifier.citation | Journal Of The Electrochemical Society, 2004, v. 151 n. 7, p. B434-B439 | en_HK |
dc.identifier.issn | 0013-4651 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/44616 | - |
dc.description.abstract | The 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.extent | 11469165 bytes | - |
dc.format.extent | 465031 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | application/pdf | - |
dc.language | eng | en_HK |
dc.publisher | Electrochemical Society, Inc. The Journal's web site is located at http://ojps.aip.org/JES | en_HK |
dc.relation.ispartof | Journal of the Electrochemical Society | en_HK |
dc.rights | Journal of Electrochemical Society. Copyright © Electrochemical Society, Inc. | en_HK |
dc.rights | Reproduced 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 publication | en_HK |
dc.subject | Chemistry | en_HK |
dc.subject | Electrochemistry | en_HK |
dc.title | Microbiologically induced corrosion of 70Cu-30Ni alloy in anaerobic seawater | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+Seawater | en_HK |
dc.identifier.email | Chan, KY:hrsccky@hku.hk | en_HK |
dc.identifier.email | Fang, HHP:hrechef@hkucc.hku.hk | en_HK |
dc.identifier.authority | Chan, KY=rp00662 | en_HK |
dc.identifier.authority | Fang, HHP=rp00115 | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1149/1.1756153 | en_HK |
dc.identifier.scopus | eid_2-s2.0-3242740492 | en_HK |
dc.identifier.hkuros | 93247 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-3242740492&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 151 | en_HK |
dc.identifier.issue | 7 | en_HK |
dc.identifier.spage | B434 | en_HK |
dc.identifier.epage | B439 | en_HK |
dc.identifier.isi | WOS:000222676300033 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Huang, G=9247555100 | en_HK |
dc.identifier.scopusauthorid | Chan, KY=7406034142 | en_HK |
dc.identifier.scopusauthorid | Fang, HHP=7402542625 | en_HK |
dc.identifier.issnl | 0013-4651 | - |