Limiting current of electrochemical deposition of copper from copper sulfate and sulfuric acid solution on a vertical electrode under conditions of natural convection

The transport problem is solved and a new equation is derived for calculati on of the limiting current of copper deposition on a plane vertical cathode in CuSO4 + H2SO4 (in excess) solution under the conditions of natural conv ection. In contrast to the earlier published studies, no ionic transport nu mbers were used for consideration of the contribution of migration transfer . The derived equation allows us to determine quantitatively the effect on the limiting current not only of the mass coefficient of supporting electro lyte, but also of the diffusion coefficients of its ions. (C) 2000 Elsevier Science B.V. All rights reserved.