Abstract
Variations in the phase composition of Zn–Ni alloy electrodeposited in acetate-chloride electrolyte have been studied as a function of ZnCl 2 concentration in electrolyte and deposition conditions: the cathodic current density ( i c), the cathodic potential ( E c) and deposition temperature ( t, °C), by using the potentiodynamic stripping method. It has been determined that the quantity of Ni in galvanostatically deposited coatings decreases more significantly at 20 °C as compared with that at 50 °C with an increase in ZnCl 2, whereas the cathodic current efficiency (CE) passes through a minimum in both cases. It has been determined that the quantity of η-phase in the Zn–Ni alloy decreases with an increase either in i c or E c. The data obtained by using the partial cycling method suggest that, in the potential range of i a peak D, not only does Ni dissolve, but the dissolution of Zn–Ni alloy also takes place.
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