Electrodeposition and corrosion behavior of Zn-Ni and Zn-Ni-Fe2O3 coatings

A thin film of Zn-Ni-Fe2O3 on steel substrates was prepared by electrodeposition technique using Zn-Ni alloy plating solution with nano-sized Fe2O3 particles. The cathodic polarization and cyclic voltammetry techniques were used to explain deposition process. The corrosion behavior of deposits was evaluated by polarization and impedance studies. Scanning electron microscope (SEM) images were used to study the surface morphology of coating. The grain size and amount of Fe2O3 particles present in composite coating were measured by X-ray diffraction pattern (XRD) and energy dispersive X-ray diffraction spectrometer (EDS), respectively.