Abstract: The nanocrystalline cobalt nickel alloy plating was prepared on carbon steel surface by using electrodeposition technique. The nanocrystalline and low friction coefficient of cobalt nickel alloy plating materials with good anti-friction properties are obtained by means of ultrasonic dispersion and mechanical stirring. The influences of current density, temperature, pH value and other process parameters on the composition and wear resistance of alloy plating are studied. The microstructure, phase structure and component content of the plating surface are analyzed by using scanning electron microscopy (SEM), field emission scanning electron microscope, and X-ray diffractometer, and UNMT1 micro/nano composite material mechanics testing system is used to investigate micro wear performance of plating. The results show that the alloy plating has fine organization and uniform structure, the process parameters have greater influences on micro friction coefficient of the alloy layer, and the minimum average friction coefficient of alloy plating is 0.18 for the current density of 1.5 A/dm², temperature of 50 ℃, and pH=4.0, and the alloy has good micro friction and wear performance. Key

Key words: cobaltnickelalloy, electrodeposition, nanocrystalline, microfrictionandwear