The effect of heat treatment on properties of Ni–P–SiO2 nano-composite coating

详细

In this study, the surface morphology of Ni–P–SiO₂ composite coating was investigated by field emission scanning electron microscopy (FESEM). The amount of SiO₂ in the coating was examined by energy dispersive analysis of X-ray (EDX) and the Corrosion behavior of coating was evaluated by electrochemical impedance spectroscopy (EIS) and polarization techniques, showing the corrosion resistance of Ni–P–SiO₂ diminished after heat treatment. The results showed that in the coating with 12.5 g/L SiO₂, the coating hardness enhanced from 453VH to 980 VH before and after heat treatment. Furthermore, the wear behavior of the coating was analyzed before and after heat treatment.