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Electrochemical Behavior of Mono- and Polycrystalline Zirconium Electrodes in Sulfuric Acid Solutions

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Abstract

Electrochemical behavior of a Zr electrode in sulfuric acid solutions is studied, at various overpotentials, temperatures, pH values, and concentrations of surfactants, in a cathodic potential range. A mechanism of hydrogen evolution at zirconium electrode is proposed. The supposition that zirconium readily forms a hydride, which essentially changes the electrochemical properties of surface, is confirmed. When heated, this phase readily decomposes yielding hydrogen. Hydrogenation of a Zr monocrystal causes cracking of its surface in a certain crystallographic direction. By x-ray diffraction analysis, indices of a working face of zirconium monocrystal are determined and the variations in the lattice constants under vigorous hydrogenation are calculated.

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Shavkunov, S.P., Tolkachev, A.B. Electrochemical Behavior of Mono- and Polycrystalline Zirconium Electrodes in Sulfuric Acid Solutions. Protection of Metals 39, 222–227 (2003). https://doi.org/10.1023/A:1023906902032

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  • DOI: https://doi.org/10.1023/A:1023906902032

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