Convective instability of a zinc sulfate solution in a cell with horizontal plane-parallel electrodes

The Rayleigh-Bénard convective instability in a cell with horizontal zinc electrodes is considered. The space between the electrodes is filled with a ZnSO₄ solution. The linear plot of the difference between the zinc deposition currents (I) in the cases where the anode is the upper or lower electrode vs. the square root of the zinc deposition current in the absence of convection is found experimentally. It is shown that the critical Rayleigh number can be determined by an extrapolation of this plot.Translated from Elektrokhimiya, Vol. 41, No. 2, 2005, pp. 247–249.Original Russian Text Copyright © 2005 by Tomashova, Teplitskaya, Grigin, Davydov.