Abstract
In the pulsed current electrolysis of both zinc chloride and zinc sulphate baths, changes in the morphology of zinc deposits, cathodic overpotential and differential capacity were studied as a function of pulse current density, on-time and off-time. High pulse current density and long off-time electrolysis increased the cathodic overpotentials and thus produced fine grained deposits. Increase in on-time, however, gave no effect on the grain size of the deposits and overpotential values. These results suggest that the crystallization process of zinc in the pulsed current electrolysis is influenced by the cathodic overpotentials during on-time and the initial stage of off-time.
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