Solid-Phase Surface Adsorption of Components
in the System AgAu|F(H₂O)

E. V. Bobrinskaya, A. V. Vvedenskii, and I. K. Marshakov

Voronezh State University, Universitetskaya pl. 1, Voronezh, 394893 Russia

Received May 21, 1998; in final form, January 25, 1999

Abstract—A procedure is developed for estimating solid-phase adsorption effects in homogeneous binary
alloys, which utilizes double-layer ac measurements. As established in the ideal-solution approximation, in an
aqueous KF solution, gold accumulates on the surface of Ag–Au alloys that contain predominantly Ag. In alloys
initially reach in Au, the surface-active component may be Ag. The specific free interphase energy and charge
density of the surface vary nonadditively with its composition. Interactions between species in the solid phase
must be allowed for when constructing a complete isotherm of the surface composition.

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