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Dissolution of Iron and Ionization of Hydrogen in a Neutral Borate Buffer under a Cyclic Potential Pulse

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Abstract—When the potential step is cycled between the values corresponding to the regions of iron pre-passivity and cathodic hydrogen evolution, the rate of metal dissolution in a borate buffer (pH 6.7) decreases, and the external anode current increases with an increase in signal frequency and amplitude. The changes in anode current in time after switching the potential are considered. The initial sections of current transients correspond to the diffusion-phase-boundary kinetics of hydrogen extraction from metal. It is assumed that the decrease in the dissolution rate of iron upon a potential pulse is due to the inhibitory effect of atomic hydrogen.

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Correspondence to A. A. Rybkina.

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Translated by A. Tulyabaev

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Rybkina, A.A., Marshakov, A.I. Dissolution of Iron and Ionization of Hydrogen in a Neutral Borate Buffer under a Cyclic Potential Pulse. Prot Met Phys Chem Surf 57, 1263–1271 (2021). https://doi.org/10.1134/S2070205121070169

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  • DOI: https://doi.org/10.1134/S2070205121070169

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