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Journal Articles Corrosion Science Year : 2005

Reduction of silver tarnishing and protection against subsequent corrosion

Abstract

The kinetics of tarnishing formation was examined on a polished silver dipped in a 10 mM Na2S. The recovery of an initial bright surface was then obtained by cathodic reduction of the tarnish layer in a 5% sesqui-carbonate solution. Two protection methods to prevent a further formation of a dark deposit were tested: an electrodeposited poly(amino-triazole) film and the surface treatment in hexadecane-thiol. The protection by poly(amino-triazole) is not reliable for all nuances of silver. In contrast, the film formed with hexadecane-thiol showed satisfactory properties. The formations of tarnish and protective films were examined by electrochemical methods, the reflectance measurements, and the quartz crystal microbalance.

Dates and versions

hal-04175272 , version 1 (02-08-2023)

Identifiers

Cite

Marie Claude Bernard, E. Dauvergne, M. Evesque, Michel Keddam, Hisasi Takenouti. Reduction of silver tarnishing and protection against subsequent corrosion. Corrosion Science, 2005, 47 (3), pp.663-679. ⟨10.1016/j.corsci.2004.07.015⟩. ⟨hal-04175272⟩
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