Dissolution of Iron and Ionisation of Hydrogen in Borate Buffer under Cyclic Pulse PolarisationстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 1 апреля 2020 г.
Аннотация:The dissolution of iron in a neutral borate buffer under the action of the cyclic potential pulses of various amplitudes and frequencies was studied. If the potential is cycled between the values that correspond to the pre-passivity of iron and cathodic hydrogen evolution, the rate of metal dissolution decreases while the external anodic current increases with the frequency and amplitude of the signal. We consider the reasons for which the anodic current changes with time after the potential is switched and show that the initial segments of current transients correspond to a‘solid-state diffusion–phase-boundary kinetics, mixed rate control’mechanism of hydrogen extraction from the metal. An assumption is made that the decrease in the iron dissolution rate under the potential pulse is related to the inhibiting effect of atomic hydrogen.