Effect of reverse pulse time on electrodeposited Ni-W coatings

This work investigates the effects of varying reverse pulse time (0 s, 0.5 s, 1 s, 2.5 s, and 5 s) and varying the forward current densities (20 mA/cm2, 40 mA/cm2 and 60 mA/cm2) on the surface structure, composition, hardness and corrosion resistance of Ni-W coatings deposited by the pulse reverse current (PRC) electrodeposition method. It was observed that the reverse pulse current time and the forward current density a parabolic affect the corrosion resistance of the Ni-W coatings. The optimum reverse pulse time and forward current density for the set of parameters used in the experiments was determined to be 1 s and 40 mA/cm2.