Abstract
Several heat treatment processes were applied on the mild steel of SS400, which were coated with Ni-P-Al2O3 composite film through an electroless plating process by blending A12O3 particles in mean diameter of 0.05µm at the amount of 1.0g/L. The corrosion resistance and the wear resistance were respectively investigated by polarization measurement and pin-on-disk method. It is observed from the specimen surface that damage and deformation occurred after heat treatment in the Ni-P nodules embedded with Al2O3 particles; therefore, both the corrosion resistance and the wear resistance were accordingly changed. Both the increase in the heating up time and the prolonging of the temperature holding time are confirmed to be helpful to enhance the corrosion and the wear resistances of the Ni-P-Al2O3 film coated steel.
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