Abstract
Using an earlier-developed dynamic model for a porous flow-through electrode (PFE) with a high initial conductivity, the effect of the solution’s flow rate (0.05–10 cm/s) and direction on the final metal weight m f and uniformity of the metal distribution in the porous matrix is studied. It is found that m f increases with increasing flow rate. However, the dependence is nonmonotonic: it peaks at intermediate flow rates. The peak is most pronounced in the case of rear supply. At high and very low flow rates, m f is independent of the flow direction. In the first case, the metal distribution profiles almost coincide, while in the second case they are mirror-opposite. The deposit weight correlates well with the index of uniformity of its distribution: all other factors being equal, the more uniform the deposit distribution in PFE, the larger the m f. These effects are explained by taking into account the joint effect of profiles of cathodic polarization and concentration of metal ions in PFE.
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Original Russian Text © A.I. Maslii, N.P. Poddubnyi, A. Zh. Medvedev, 2006, published in Elektrokhimiya, 2006, Vol. 42, No. 2, pp. 183–189.
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Maslii, A.I., Poddubnyi, N.P. & Medvedev, A.Z. Effect of rate and direction of solution flow on metal deposition in porous electrodes: The final weight and distribution of the deposit. Russ J Electrochem 42, 157–162 (2006). https://doi.org/10.1134/S102319350602008X
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DOI: https://doi.org/10.1134/S102319350602008X