Corresponding Author

Zhi-dong CHEN(zdchen@cczu.edu.cn)


The nickel ions (Ni2+) were introduced into choline chloride (ChCl) cyanide free immersion gold solution to improve the surface quality of electrodeposition on medium-phosphorus nickel substrate. The addition of Ni2+ had no significant impact on the plating speed. However, the hyperactive corrosion of nickel substrate could be effectively alleviated by the addition of 500 mg·L-1 NiCl2·6H2O, and the surface morphology of gold coating could be greatly improved. The choline chloride bath has great potential for industrial production due to its high Ni2+ carrying capacity (2000 mg·L-1) and superior applicability to medium-phosphorus nickel substrate.

Graphical Abstract


non-cyanide, immersion gold, choline chloride, hyperactive corrosion, Ni2+

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