effect of incorporation of nano-zno particle on the hardness and wear resistance of electroless ni-p coating

Electroless ni-p coating have been used in various industries for the last decades, due to their unique combination of properties such as; good wear and corrosion resistance, low porosity and ability to plate on nonconductors. in the present study, various amounts of nano-zno particles with average diameter of 50nm were incorporated into ni-p plates. composite coating were prepared using hypophosphite reduced electroless nickel bath. effect of nano-zno particle content on the hardness and wear resistance of electroless ni-p coating was investigated and compared with that of the unreinforced ni-p plates. the results indicated that incorporation of nano-zno particles resulted in increasing of hardness and wear resistant of the plates. the decrease in the metal-metal content surface in the presence of nano-zno particles was found to be responsible for the improved wear resistance of the composite coatings.