Abstract
Electrochemical deposition of a two-component Ni-Cu coating onto Fe powder particles was studied by constant current electrolysis. The influence of the Ni(II) to Cu(II) salts ratio in the electrolyte, of the addition of sodium citrate as complexing agent to the electrolyte, and of the current density with respect to the total surface of compact and dispersed electrodes was studied. It was shown that the less noble Ni deposition is facilitated mainly by its large excess in the electrolyte and by an increase in current density. The addition of a complexing agent exhibits only a very slight influence on the coating composition but does suppress the spontaneous deposition of Cu. The current efficiencies of Ni, Cu and Ni-Cu deposition on the powder particles decrease with increasing sodium citrate concentration and current density.
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Acknowledgements
Financial support of the Grant Agency of the Slovak Republic within the frames of project no. 1/9038/02 is gratefully acknowledged.
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Turoňová, A., Gálová, M. & Šupicová, M. Parameters influencing the electrodeposition of a Ni-Cu coating on Fe powders. I. Effect of the electrolyte composition and current density. J Solid State Electrochem 7, 684–688 (2003). https://doi.org/10.1007/s10008-003-0372-1
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DOI: https://doi.org/10.1007/s10008-003-0372-1