سينتيك فرآيند الكترووينينگ كبالت از حمام سولفاتي

Kinetics of Electrowinning of Cobalt from Sulfate Bath

Nowadays cobalt is mostly produced through electrowinning process of sulfate solution. Regarding competitive cobalt precipitation and hydrogen evolution in the cathode during reduction in a sulfate bath, investigation on the mechanism of metal precipitation is of great importance. In the present work, study on the kinetics of cobalt electrowinning and the mechanism of involved reactions have been carried out. The obtained results, represent that the cobalt precipitation by depletion of hydroxides. The effects of temperature and scan rate parameters were studied on electrowinning of cobalt by cyclic voltammetry technique. The diffusion coefficient and rate constant of the reaction were measured and calculated by performed experiments.