Effect of Plating Solution Al2O3 Mass Concentration on Properties of Flexible Friction-Assisted Electrodeposition Ni-Co Composite Coatings
Flexible friction-assisted electrodeposition was used to prepare n-Al2O3/Ni-Co composite coatings on the surface of gunmetal substrate,the effect of the concentration of Al2O3 in the plating solution on the organisational structure and properties of Ni-Co composite coatings was investigated.The results showed that the plating layer had the finest average grain size(9.6 nm)and the largest microhardness(573.28 HV)when the mass concentration of Al2O3 was 5 g·L-1.At this time,the self-corrosion potential of the coating shifted to-0.304 V,the self-corrosion current was small(1.313 μA·cm-2),and the corrosion resistance was good.
Al2O3 mass concentrationNi-Co composite coatingGrain sizeMicrohardnessCorrosion resistance
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