The growth of dendritic deposit under galvanostatic electrolysis is modeled and a method is developed to analyze its formation in laboratory. The time dependences for cathodic overpotential are plotted and the rod electrode with deposit is video-recorded to establish that copper dendrites form at smaller tip-radius density from the solution with surface-active agent F2 than from the solution without additions. This results in higher fluidity of the powder. Nevertheless, dendrites formed from the solution with F2 addition have greater tip radii than the deposit from the pure solution. In addition, the dendritic deposit intensively grows for a longer time with F2 addition, thus increasing the yield of powder and decreasing the yield of cathodic scrap. The results from the laboratory experiment have been confirmed by commercial production.
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Translated from Poroshkovaya Metallurgiya, Vol. 49, No. 1–2 (471), pp. 3–10, 2010.
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Murashova, I.B., Agarova, N.E., Darintseva, A.B. et al. Formation of copper deposits under electrolysis with surface-active agents. Powder Metall Met Ceram 49, 1–7 (2010). https://doi.org/10.1007/s11106-010-9194-8
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DOI: https://doi.org/10.1007/s11106-010-9194-8