Study on(Ni-P)-WC Nanoparticles Electroless Composite Coatings

(Ni-P)-WC nanoparticles composite coatings were prepared by electroless process in Ni-P plating solution containing WC nano-particles.The influences of the WC nano-particles concentration on the composition of the composite coatings were investigated.The surface morphologies of the Ni-P alloy and(Ni-P)-WC nanocomposite coating were observed using a scanning electron microscope(SEM).The microhardness of(Ni-P)-WC nanocomposite coatings increases with the increase in content of the WC nano-particles in the coatings.The corrosion behavior of Ni-P alloy coating and(Ni-P)-WC nanocomposite coatings was examined by open circuit potential curves and electrochemical impedance spectroscopy(EIS) in NaCl solution.It shows that(Ni-P)-WC nanocomposite coatings has better corrosion resistance than the Ni-P alloy coating.