Please use this identifier to cite or link to this item: https://doi.org/10.1149/1.2777013
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dc.titleModification of surface-oxidized copper alloy by coupling of viologens for inhibiting microbiologically influenced corrosion
dc.contributor.authorYuan, S.J.
dc.contributor.authorXu, F.J.
dc.contributor.authorKang, E.T.
dc.contributor.authorPehkonen, S.O.
dc.date.accessioned2014-10-08T08:32:59Z
dc.date.available2014-10-08T08:32:59Z
dc.date.issued2007
dc.identifier.citationYuan, S.J., Xu, F.J., Kang, E.T., Pehkonen, S.O. (2007). Modification of surface-oxidized copper alloy by coupling of viologens for inhibiting microbiologically influenced corrosion. Journal of the Electrochemical Society 154 (11) : C645-C657. ScholarBank@NUS Repository. https://doi.org/10.1149/1.2777013
dc.identifier.issn00134651
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87564
dc.description.abstractMicrobiologically influenced corrosion (MIC) is extremely harmful to maritime industries and to the environment. A surface modification technique was developed in this work to impart antibacterial and corrosion-inhibition properties onto the surface-oxidized Cu-Ni alloy to inhibit MIC. Thus, 4-(chloromethyl)phenyl tricholorosilane was first immobilized on the oxidized metal surface to allow the coupling of 4, 4′ -bipyridine to the methyl-chloride groups. Subsequently quaternization by benzyl chloride converted the terminal pyridine groups into pyridinium groups. The success of each functionalization step was ascertained by X-ray photoelectron spectroscopy, atomic force microscopy, and static water contact angle measurement. The quaternized viologen moieties exhibited good bacterial inhibition efficiency at the initial stages of exposure to a seawater-based medium containing aerobic bacteria belonging to the genera Pseudomonas, as revealed by scanning electron microscopy images. The corrosion-inhibition properties of the organic layer were verified by Tafel polarization curves, cyclic polarization curves, and electrochemical impedance spectroscopy. In comparison, the pristine Cu-Ni alloy was readily susceptible to MIC in the same medium and under the same conditions. © 2007 The Electrochemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1149/1.2777013
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1149/1.2777013
dc.description.sourcetitleJournal of the Electrochemical Society
dc.description.volume154
dc.description.issue11
dc.description.pageC645-C657
dc.description.codenJESOA
dc.identifier.isiut000249787900037
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