Corrosion-Electrochemical Behavior of Nickel Monosilicide in Alkaline Electrolyte
15.12.2008 г.

Corrosion-Electrochemical Behavior of Nickel Monosilicide in Alkaline Electrolyte

A. B. Shein and I. L. Sergeeva

 

Perm State University, ul. Bukireva 15, Perm, 614990 Russia

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Received April 28, 2003

 

Abstract — Corrosion-electrochemical behavior of compact and powder electrodes of nickel monosilicide (NiSi) and pure Ni and Si in 0.1–5.0 M NaOH solutions is studied by using steady-state and cyclic voltammetry. The main regularities of NiSi anodic dissolution are revealed. It is shown that, in spite of the fact that Si solubility increases with an increase in the pH value, nickel monosilicide exhibits a high anodic resistance due to the protective properties of surface Ni(OH)2 . At high anodic potentials, Ni(OH)2 frame0 NiOOH reversible conversion takes place.