Critical curent density for less-noble metal (Zn, Cd, Mn) deposition from sulfate baths

摘要

The critical current densities for the electrodeposition of less noble metals such as Zn, Cd and Mn were measured using sulfate baths. The results obtained are as follows: For Mn deposition, the cathode potential was shifted to the equilibrium potential of Mn to occur its deposition by a significant diffusion overpotential of hydrogen ion. The critical current densities of Zn and Cd were smaller than the limiting current density of hydrogen ion.