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http://dx.doi.org/10.5229/JKES.2009.12.3.258

Effects of Mo on the Passive Films Formed on Ni-(15, 30)Cr-5Mo Alloys in pH 8.5 Buffer Solution  

Jang, Hee-Jin (Dept. of Metallurgical Engineering, Chosun University)
Kwon, Hyuk-Sang (Dept. of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Journal of the Korean Electrochemical Society / v.12, no.3, 2009 , pp. 258-262 More about this Journal
Abstract
The composition and semiconducting properties of the passive films formed on Ni- (15, 30)Cr-5Mo alloys in pH 8.5 buffer solution were examined. The depth concentration profile of passive films formed on Ni-(15, 30)Cr-5Mo in pH 8.5 buffer solution showed that Mo enhances the enrichment of Cr. The Mott-Schottky plot for the passive film on Ni-(15, 30)Cr- 5Mo closely resembled that for the film on Cr, whereas those for the less Cr-enriched film on Mo-free alloys showed similar behavior to that for the film on Ni. The acceptor density was reduced by increasing Cr content in Ni-(15, 30)Cr-(0, 5)Mo alloys, but addition of Mo considerably increased the acceptor density.
Keywords
Ni-Cr-Mo alloy; Passive film; Mott-Schottky analysis;
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