Effect of MoS2 concentration on properties of electrodeposited Ni-P-MoS2 composite coatings
Ni-P-MoS2 composite coatings was prepared on the surface of Q235 steel by electrodeposition method to solve the problems of corrosion and wear in industrial production,and the influence of the concentration of MoS2 nanoparticles on the surface morphology and properties of the composite coating was studied.The addition of nanoparticles is shown to increase the cellular structure on the surface of the composite coating and improve corrosion resistance.When the MoS2 concentration is 4 g/L,the impedance value reaches the maximum value of 32 000 Ω·cm2,and increased to 58 800 Ω·cm2 after 20 days of salt spray test.With the increase of MoS2 concentration,the hardness of composite coating shows a trend of first increasing and then decreasing.The highest hardness is 690.2 HV when the concentration is 4 g/L.And the addition of MoS2 can improve the tribological properties of the coating.Compared with Ni-P coating,the friction coefficient and wear of composite coatings are reduced by 39％and 55％.
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