A tartrate nickel plating bath has been used to prepare nickel- tungsten (Ni-W) dispersed PTFE\ncomposite coatings with four different PTFE contents (0, 4, 8 and 20 gl-1). The coatings are\ncharacterized using of Field-Emission Scanning Electron Microscopy (SEM), Energy Dispersive Xray\nAnalysis (EDAX) and X-ray Diffractrometry (XRD). XRD results indicate that the PTFE particle\nchanged the surface texture significantly. The nano tribological behavior of the nano composite\ncoating was estimated by contact mode of AFM. Electrochemical performance of the nanocomposite\ndepositions was evaluated using potentiodynamic polarization and electrochemical impedance\nspectroscopy (EIS). The results show that the Ni-W/PTFE nanocomposite films exhibit better\nelectrochemical and tribological performance than the Ni-W coating. The corrosion rate and surface\nroughness decreased about 50 and 5 times less than bare coating in optimum condition 8 gl-1 PTFE.
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