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An electrochemical investigation of the dissolution of copper, nickel and copper-nickel alloys in ammonium carbonate solution

Nicol, M.J. (1975) An electrochemical investigation of the dissolution of copper, nickel and copper-nickel alloys in ammonium carbonate solution. Journal of the South African Institute of Mining and Metallurgy, 75 . pp. 291-302.

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Abstract

The dissolution of copper and nickel in ammonium carbonate solution was studied by techniques involving electrcchemical anodic dissolution and ring-disc electrodes. The rate of oxidation of both copper and nickel by copper (11) was shown to be controlled mainly by diffusion to the surface. Variations in rate with changes in copper (11) concentration, agitation, pH, ammonia concentration, temperature, and copper (I) concentration were investigated and rationalized in terms of their effects on the electrochemical half-reactions involved. Evidence was found for the passivation of nickel and nickel-copper alloys of more than 50 per cent nickel.

Publication Type: Journal Article
Publisher: SAIMM
Copyright: © 1975 SAIMM
URI: http://researchrepository.murdoch.edu.au/id/eprint/29995
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