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Current efficiency and kinetics of cobalt electrodeposition in acid chloride solutions. Part II: the influence of chloride and sulphate concentrations

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Abstract

The influence of cobalt chloride concentration, total chloride concentration and sulphate in the electrolyte on cobalt deposition were studied. The current efficiency increased and the overpotential for electrodeposition of cobalt decreased with increasing cobalt chloride concentration. Only minor changes were observed with addition of sodium chloride to the cobalt chloride solution. Sulphate electrolyte resulted in lower current efficiency and higher overpotential for electrodeposition when compared to a similar cobalt chloride electrolyte.

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Acknowledgements

Falconbridge Nikkelverk A/S in Norway and the Research Council of Norway (NFR) are acknowledged for financial support of this project.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491, Trondheim, Norway

    O. E. Kongstein, G. M. Haarberg & J. Thonstad

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  1. O. E. Kongstein
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  2. G. M. Haarberg
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  3. J. Thonstad
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Correspondence to O. E. Kongstein.

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Kongstein, O.E., Haarberg, G.M. & Thonstad, J. Current efficiency and kinetics of cobalt electrodeposition in acid chloride solutions. Part II: the influence of chloride and sulphate concentrations. J Appl Electrochem 37, 675–680 (2007). https://doi.org/10.1007/s10800-007-9298-0

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  • DOI: https://doi.org/10.1007/s10800-007-9298-0

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