This paper discusses the optimization of ail electroplating bath for smooth and uniform deposition of zinc-nickel alloy oil mild steel. Electroplating has been carried Out in a chloride bath Using glycine and gelatin as additives. The effect of bath conditions and operating parameters on chemical composition, micro-hardness and appearance of the deposit have been studied and discussed. The experimental results reveal that a bright Zn-Ni alloy having about 13.6 %Ni is showing good performance against corrosion. The corrosion resistance of the deposit is found to be characteristic of its %Ni content, and is improved drastically after chronic passivation. The bath follows anomalous codeposition with preferential deposition of Zn over the entire current density range used for the study. The increase of %Ni in the deposit with Current density is due to the depletion of more readily depositable Zn2+ ions at the cathode. No transition current density, at which the codeposition behaviour chan.-ed from the anomalous to normal type, was observed during the study. The increase of %Ni in the deposit at high current density (c.d.) is attributed to high ratio of Ni2+/Zn2+ in the bath. The effect of temperature oil the plating process showed that codeposition of metals on the cathode is diffusion controlled.