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Electrochemical Behavior of Manganese Silicides in Sulfuric Acid Solution |
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30.09.2008 г. |
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Electrochemical Behavior of Manganese Silicides in Sulfuric Acid Solution A. B. Shein and E. N. Zubova Perm State University, ul. Bukireva 15, Perm, GSP, 614990 Russia e-mail:
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Received December 23, 2002 Abstract — The corrosion-electrochemical behavior of Mn5Si3 and MnSi silicides in the sulfuric acid electrolyte is studied by using the steady-state and cyclic voltammetry in combination with atomic absorption analysis. The following main regularities of the anodic dissolution of silicides are revealed: Mn dissolves selectively from the sublattice in silicide and, then, the process is controlled by diffusion of Mn in the compound and oxidized Mn through a layer of hydrated SiO2 oxide formed at the surface.
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