Аннотация:The goal of this work is to clarify the interacting effect of the composition and phase structure of nickel-cobalt-tantalum alloys on their anodic behavior in sulfuric acid. The anodic polarization curves were taken in a 4 N solution of sulfuric acid at 25 degree C. The binary nickel-cobalt alloys having the single phase gamma -solid solution structure have varying electrochemical properties with change in the component ratio.