STUDY OF CHARACTERIZATION AND CORROSION RESISTANCE OF NIP/NANO-DIAMOND ELECTROLESS COMPOSITE DEPOSITION

Ni-p electroless coatings provide appropriate resistance to wear and corrosion. co-deposition of particlesbetween layers can improve their properties, especially general corrosion and erosion-corrosion behavior by meansof nano diamond as reinforcing particles. in this study ni-p/nano diamond composite deposition were deposited onsteel substrate. structure of the coatings and corrosion resistance of theme were investigated by scanning electronmicroscopy and corrosion tests in salty media. the composite structure of the deposit was evaluated as nano sizewithout using any surfactants. also results for the composite coating show better corrosion protection and higherhardness comparing with as -deposited ni-p. the optimum concentration of diamond nanometer particles were foundby evaluation of scanning electron microscopy pictures, hardness measurement, linear polarization andelectrochemical impedance spectroscopy results.