Research on surface modification and corrosion and wear resistance of architectural aluminum alloy template
In order to improve the surface corrosion resistance and wear resistance of building aluminum alloy templates,a polyurethane/Al(Ni based amorphous alloy)coating was prepared on the surface of 6061 aluminum alloy templates.The effect of Ni-based amorphous alloy powder replacing Al powder ratio on the surface morphology,cross-sectional morphology,hardness,wear resistance,and corrosion resistance of the composite coating was studied.The results showed that as the substitution rate of Ni-based amorphous alloy powder increased,the number of pores on the surface of the composite coating decreased,and the area fraction of defects such as pores decreased.The thickness of the composite coating with different volume fractions of Ni-based amorphous alloy powder was about 125 μm.After adding Ni-based amorphous alloy powder to the coating,the microhardness and wear resistance of the composite coating were improved to varying degrees,and the bonding strength with the substrate was reduced to varying degrees.Moreover,as the volume fraction of Ni-based amorphous alloy powder in the composite coating increased,the microhardness of the composite coating gradually increased,and the bonding strength and wear rate with the substrate gradually decreased.The corrosion rate of composite coatings added with Ni-based amorphous alloy powder was lower than that of T0 coatings without Ni-based amorphous alloy powder,and the composite coating with a volume fraction of 45％Ni-based amorphous alloy powder had higher hardness,wear resistance and optimal corrosion resistance.
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