Abstract: Electroless plating NiZnP alloys have been obtained from the bath having boric acid as a buffer agent and sodium citrate as a complexing agent. The effects of deposition parameters, such as pH and mole ratios of ZnSO₄ to (ZnSO₄+NiSO₄) on the plating rate, coating composition, structure, surface morphology and corrosion resistance of the alloys were examined. It was found that the presence of zinc sulfate in the bath has an inhibitory effect on the alloy deposition. As a consequence, the percentage of zinc in the deposits never reaches values higher than at.20%. The structure and surface morphology were charactered by XRD, TEM and SEM. The NiZnP alloy consists of amorphous phase together with little cubic nickel phase, and its surface morphology depencdes on the deposition variables. The corrosion resistance of the NiZnP deposits in ω(NaCl)=3.5% solution(pH=7.0) was studied by mass loss test and electrochemical anodic polarization measurement. The results show that the depo sits plated at different deposition condition have different corrosion resistance and the deposits with higher percentage of zinc and less percentage of phosphorus have better resistance corrosion than that with less percentage of zinc and higher percentage of phosphorus. The results of mass loss tests were basically in accordance with that from electrochemical anodic polarization measurements.