The phase composition of Zn-Ni alloys electrodeposited from acetate-chloride plating solutions containing Zn+2 and Ni+2 ions at ratio of 1-12.8 at 50 A degrees C was investigated by the potentiodynamic stripping method. Two anodic current density (i (a)) peaks emerged in potentiodynamic stripping curves (PDC) at E < 0.0 V and E > 0.0 V (vs. Ag/AgCl/KClsat), that were attributed to oxidation of certain phases of the Zn-Ni alloy. The ratio of these phases in deposited Zn-Ni alloys under potentiodynamic conditions was affected by the potential sweep rate (nu) and maximum cathodic current density (i (c)) The ratio of Zn and Ni in certain phases of Zn-Ni alloy was determined by the partial potentiodynamic stripping technique. Experimental data show that Zn-Ni alloy, containing 6.5 at.% Zn and 93.5 at.% Ni and dissolved in i (a) peak H (E > 0.0 V), provides the black coloration of the Zn-Ni alloy.