{"title":"Current Density Effect on Nickel Electroplating Using Post Supercritical CO2 Mixed Watts Electrolyte","authors":"Chun-Ying Lee, Mei-Wen Wu, Van Cuong Nguyen, Hung-Wei Chuang","volume":79,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1424,"pagesEnd":1430,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/16394","abstract":"
In this study, a nickel film with nano-crystalline grains,
\r\nhigh hardness and smooth surface was electrodeposited using a post
\r\nsupercritical carbon dioxide (CO2) mixed Watts electrolyte. Although
\r\nthe hardness was not as high as its Sc-CO2 counterpart, the thin coating
\r\ncontained significantly less number of nano-sized pinholes. By
\r\nmeasuring the escape concentration of the dissolved CO2 in post
\r\nSc-CO2 mixed electrolyte with the elapsed time, it was believed that
\r\nthe residue of dissolved CO2 bubbles should closely relate to the
\r\nimprovement in hardness and surface roughness over its conventional
\r\nplating counterpart. Therefore, shortening the duration of
\r\nelectroplating with the raise of current density up to 0.5 A\/cm2 could
\r\neffectively retain more post Sc-CO2 mixing effect. This study not only
\r\nconfirms the roles of dissolved CO2 bubbles in electrolyte but also
\r\nprovides a potential process to overcome most issues associated with
\r\nthe cost in building high-pressure chamber for large size products and
\r\ncontinuous plating using supercritical method.<\/p>\r\n","references":"
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