  Cu-Sn-Zn coatings have been widely used in industry for their unique
properties, such as good conductivity, high corrosion resistance and excellent
solderability. To further improve the mechanical performance of Cu-Sn-Zn
coatings, powder-enhanced method was applied in the current study and
Cu-Sn-Zn-TiO2 nano-composite coatings with different TiO2 concentration were
fabricated. The microstructure of Cu-Sn-Zn-TiO2 nano-composite coatings were
investigated by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM).
The mechanical properties of coatings including microhardness and wear
resistance were studied. The results indicate that the incorporation of TiO2
nanoparticle can significantly influence the properties of Cu-Sn-Zn coatings.
The microhardness of Cu-Sn-Zn coating was increased to 383 HV from 330 HV with
1g/L TiO2 addition. Also, the corrosion resistance of coating was enhanced. The
effects of TiO2 nanoparticle concentration on the microstructure, mechanical
properties and corrosion resistance of Cu-Sn-Zn-TiO2 nano-composite coatings
were discussed.
