Several features of the electrode reactions that occur at the surface of transition metal silicide (high strength metal-silicon bond, the effect of chemical reactions and the formation of passivating oxide films) leading to high interest to intermetallic compounds. Anodic behavior of the MnSi electrode in solutions 0.5 M H2SO4 and 0.05 M H2SO4 + 0.45 M Na2SO4 was studied by polarization and impedance measurements. It was concluded that the surface of manganese silicide is coated with an oxide film similar in composition to SiO2. The thickness and resistivity of the oxide film were calculated depending on potential and concentration of sulfuric acid. Generalization and theoretical explanation of the research results may provide a basis for predicting corrosion resistance of metal-silicon alloys in a wide range of corrosive environments.
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