Abstract
The behavior of NiSi electrode in 0.5 M H2SO4 in a potential range of active-passive transition (from −0.02 to 0.40 V (N.H.E.)) is studied with the use of impedance spectroscopy. Nyquist plots with an arc in the second quadrant (Z′ < 0 and Z″ > 0) in the lowest frequency range were constructed for the beginning of the active-passive transition. The shape of impedance plots is explained by the effect of the solid-phase diffusion of selectively dissolved nickel on the character of passivation of nickel silicide.
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Original Russian Text © V.V. Panteleeva, A.B. Shein, V.I. Kichigin, 2014, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2014, Vol. 50, No. 4, pp. 374–380.
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Panteleeva, V.V., Shein, A.B. & Kichigin, V.I. Impedance of NiSi electrode in sulfuric-acid solution in the active-passive transition range. Prot Met Phys Chem Surf 50, 466–471 (2014). https://doi.org/10.1134/S2070205114040121
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DOI: https://doi.org/10.1134/S2070205114040121