Cathode electrodeposition of lead in Pb2+-OH--C4H4Ob 2- system

By using dynamic potential method, the influence of technical parameters was studied on the cathode process of electrowinning Pb in Pb2+ -OFT -C4H4O6 2- electrolytic system, and the methods for improving lead electrodeposition efficiency were put forward. The results showed that higher Pb( II ) content is due to the cooperative effect of [OH]- with [C4O4 2- ligands in the electrolyte. The content of NaOH and KNaC4H4O6 in the electrolyte together with mixing ratio between them decide the existing forms of Pb( II ) and the relative content of its complex compounds. Under proper conditions, higher electrodeposition efficiency can be achieved. ? Xi'an Heavy Machinery Institute, Xi'an 710032.