Anodic Oxidation of Ag-Cu Alloys in Sulfuric Acid Solutions When Reaction Products are Unstable

A. V. Noskov, E. P. Grishina, and A. M. Pimenova

Institute of Solution Chemistry, Russian Academy of Sciences, ul. Akademicheskaya 1, Ivanovo, 153045 Russia

E-mail: Этот e-mail защищен от спам-ботов. Для его просмотра в вашем браузере должна быть включена поддержка Java-script

Received July 6, 2007

Abstract — Based on the impedance models of porous layer, anodic behavior of silver as a component of Ag–Cu alloys in aqueous sulfuric acid solutions is analyzed. It is shown that, in order to adequately describe the electrochemical process, chemical decomposition of superficial passivating silver-sulfate layer should be taken into account. Decomposition rate constants of the layer on silver–copper alloys of diverse composition are cal-culated.

PACS numbers: 82.45.Bb, 81.15Aa