Surface Ehancement of Nickel Ions on Cyanide Free Immersion Gold Deposited from a Chloroauric Acid-Choline Chloride Solution on Medium-Phosphorus Nickel

Authors

Tian-yu XU, School of Pertochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China;
Shi-ying WANG, chool of Materials Science & Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
Wen-chang WANG, School of Pertochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China;
Zhi-dong CHEN, School of Pertochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China;Follow

Corresponding Author

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

Abstract

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

Keywords

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

DOI Link

https://doi.org/10.13208/j.electrochem.170445

Publication Date

2018-02-28

Online Available Date

2017-10-20

Revised Date

2017-10-19

Received Date

2017-04-17

Recommended Citation

Tian-yu XU, Shi-ying WANG, Wen-chang WANG, Zhi-dong CHEN. Surface Ehancement of Nickel Ions on Cyanide Free Immersion Gold Deposited from a Chloroauric Acid-Choline Chloride Solution on Medium-Phosphorus Nickel[J]. Journal of Electrochemistry, 2018 , 24(1): 170445.
DOI: 10.13208/j.electrochem.170445
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss1/13