Electrochemical studies with copper-based alloys : open-circuit potential oscillations in alkaline media

In open-circuit potential measurements of certain Cu-based alloys in NaOH solutions oscillations were observed in Cu-Al and Cu-Ag-Al. Studies with various electrolyte concentrations and rotation speeds of the electrode led to a possible explanation of the phenomenon in terms of Al dissolution alteri...

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Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 140; no. 6; pp. 1567 - 1571
Main Authors HURTADO, M. R. F, SUMODJO, P. T. A, BENEDETTI, A. V
Format Journal Article
LanguageEnglish
Published Pennington, NJ Electrochemical Society 01.06.1993
Subjects
Applied sciences
Corrosion
Corrosion mechanisms
Exact sciences and technology
Metals. Metallurgy
Open circuit
Copper Aluminium Silver Alloys
Electrochemical corrosion
Oxidation
Potential
Experimental study
Copper alloy
Sodium hydroxide
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Summary:In open-circuit potential measurements of certain Cu-based alloys in NaOH solutions oscillations were observed in Cu-Al and Cu-Ag-Al. Studies with various electrolyte concentrations and rotation speeds of the electrode led to a possible explanation of the phenomenon in terms of Al dissolution altering the main Cu dissolution/passivation process. The accumulation of aluminate ions on the interphase and its transportation to the bulk solution are the main causes of the oscillations.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2221603