Thermodynamic Evaluation of Corrosion-Electrochemical Behaviour of Silicon Brass C_uZ_nlTSi3~1

摘要

The thermodynamic activities of brass CuZn 17Si3 components are calculated. The potential—pH diagrams for the brass CuZn 17Si3—H_2O system for 25℃, a total air pressure of I bar, and various ions activities in solution are plotted. The thermodynamic features of the chemical and electrochemical stability of brass CuZnl7Si3 are analyzed. It is shown that high corrosion resistance of brass is achieved with respect to the formation of a protective film of ZnSiO_3 on its surface.