Kinetics of Phase Transformations in the Surface Layer of a Binary Alloy at the Selective Dissolution: III. CuAu | Cu²⁺ System

O. A. Kozaderov, A. V. Saratova, and A. V. Vvedenskii

Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 Russia

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Received November 27, 2008

Abstract — Conditions of the phase transformation of gold on the surface of Cu–Au alloys selectively dissolved in an acidic sulfate solution at the overcritical anodic polarization are experimentally found. Kinetic regularities of the formation of an individual Au⁰ gold phase on the alloy surface depending on the alloy composition, anodic potential, and the presence of organic surfactants in the solutions are determined.

PACS numbers: 82.45.Qr