Please use this identifier to cite or link to this item:
Title: Modification of surface-oxidized copper alloy by coupling of viologens for inhibiting microbiologically influenced corrosion
Authors: Yuan, S.J. 
Xu, F.J. 
Kang, E.T. 
Pehkonen, S.O. 
Issue Date: 2007
Citation: Yuan, 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.
Abstract: Microbiologically 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.
Source Title: Journal of the Electrochemical Society
ISSN: 00134651
DOI: 10.1149/1.2777013
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on May 24, 2023


checked on May 17, 2023

Page view(s)

checked on May 25, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.