Effect of the metal component on anodic dissolvability of iron, cobalt, and nickel silicides

The anodic dissolution of Fe, Co, Ni, and FeSi, CoSi, and NiSi monosilicide s in 0.5 M H2SO4 is studied by the methods of electrochemistry, electron mi croscopy, and atomic absorption analysis. The anodic behavior of individual metals does not unambuguously determine the anodic resistance of silicides . Silicide NiSi is considerably less resistant than CoSi and FeSi, though, under similar conditions, individual Ni dissolves slower than Fe and Co. Di fferent anodic resistance of FeSi, CoSi, and NiSi is explained by different structures of their crystal lattices.