Abstract
Rates of electrochemical mass transfer by free convection under the influence of simultaneous thermal free convection have been measured for upward facing horizontal disc electrodes. The electrode reaction was the cathodic deposition of copper from cupric sulphate solutions containing H 2SO 4 as swamping electrolyte. Results have been correlated by the equations. ▪ and ▪ where GR m is a combined Grashof number for concentration and thermal buoyancy effects. ▪. Mass transfer has also been measured for the novel situation of nucleate boiling at the electrode surface and diffusion layer thicknesses as small as 1·7 × 10 −3mm have been obtained.
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