Electrodeposition of ZnNi/SiC Nanocomposite Coating by Pulse and Pulse Reverse Current and Evaluation of its Corrosion Behavior

In this study the characteristics of ZnNi/SiC nanocomposite coatings electrodeposited by pulse and pulse reverse current were evaluated. Morphology, structure and composition of the coatings were studied by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction Analysis. Electrochemical Polarization and Electrochemical Impedance Spectroscopy (EIS) were used to evaluate corrosion properties of different coatings. Final results showed that among nanocomposite coatings, the direct pulse current deposited sample with the duty cycle of 42.85% have better corrosion behavior, due to its more dense structure, less porosity and more Ni content, than other samples.