Abstract
ABSTRACT: An experimental study of mass transfer to an amalgamated copper rotating disc electrode has beenemployed to determine an empirical correlation for the mass transfer rate in laminar flow. The studywas performed in a three-electrodes configuration using 0.1 M boric acid and 0.1 M potassiumchloride as supporting electrolyte with Zn (II) concentration in the range (25-100 mg dm −3 ). Polar-ization curves at different zinc ion concentration are reported. Hydrogen and oxygen reduction hasalso been considered.The diffusion coefficients and mass transfer coefficient were obtained usinglimiting diffusion current technique based on zinc ion reduction. A least squares analysis indicatesthat the laminar flow results for 13067 57552 and 550 1390 can be correlated by thefollowing equation with correlation coefficient (CR) equal to 0.98: sh =0.61Re 0.5 Sc 1/3 Keywords : Rotating diskelectr ode, Electrodepostion, Mass transfer, Zinc reduction, Amalgamatedcopper electrode
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