Examination of Copper Electrowinning Smoothing Agents. Part III. Chloride Interaction with HydroStar and Cyquest N-900
Chloride ions and their interactions with two organic smoothing additives - Cyquest® N-900 and HydroStar® 4208 - during copper electrodeposition were explored using cyclic voltammetry and electrochemical impedance spectroscopy. The results revealed that chloride ions, up to a concentration of 40 mg/L, depolarized the copper deposition reaction. A combination of chloride ions and Cyquest N-900 inhibited the depolarization reaction during copper electrodeposition. It is proposed that the chloride ions acted as bridging ligands between copper and Cyquest N-900. Addition of HydroStar at a concentration of 2.5 mg/L depolarized the copper deposition reaction when no chloride ions were present. This behavior did not change with the addition of chloride ions at the concentrations tested, indicating that chloride ions and the polysaccharide do not interact.
W. Cui et al., "Examination of Copper Electrowinning Smoothing Agents. Part III. Chloride Interaction with HydroStar and Cyquest N-900," Minerals and Metallurgical Processing, vol. 33, no. 1, pp. 31-38, Society for Mining, Metallurgy and Exploration, Feb 2016.
The definitive version is available at https://doi.org/10.19150/mmp.6466
Materials Science and Engineering
Keywords and Phrases
Chloride; Copper; Cyclic voltammetry; Cyquest N-900; Electrochemical impedance spectroscopy; Electrowinning; HydroStar
International Standard Serial Number (ISSN)
Article - Journal
© 2016 Society for Mining, Metallurgy and Exploration, All rights reserved.
01 Feb 2016