Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
ISSN-L : 0917-0480
Research Paper
Chemical State Analysis of Copper Corrosion Products Including Patina by Voltammetry
Shigeyoshi NakayamaTakenori NotoyaToshiyuki Osakai
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2015 Volume 64 Issue 11 Pages 508-513

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Abstract

The previously developed voltammetric method using a strongly alkaline electrolyte (6 M KOH + 1 M LiOH) as the supporting electrolyte was applied for simultaneous determination of copper corrosion products, including the oxides and patinas. The reduction peaks of these chemical species could be separated in the electrolyte. When the method was applied to samples with patina, the fast exchange reaction presumably occurred between SO42- or CO32- ions in patinas and OH ions in the electrolyte, so that the reduction peak of patina could be observed at potentials close to that of Cu(OH)2.

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© 2015 Japan Society of Corrosion Engineering
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