The concentration profile of Cu2+ ion and the velocity profile of natural convection near a Vertical plane copper anode immersed in 0.6 M CuSO4 solution were measured under the electrolytic condition of uniform current density distribution. Holographic interferometry and tracer technique were applied. The current density distribution was examined with a miniature probe method. It was fairly uniform at the average current density less than 4 mA cm(-2) The experimental values of the concentration difference of Cu2+ ion between anode surface and bulk-electrolyte, Theta, the thickness of the diffusion layer, delta (c), the maximal velocity of natural convection, u(m), and the distance between anode surface and the position of maximal velocity, tau, were determined. Theta and u(m) increased while delta (c) and tau, on the other hand, decreased, with increasing anodic current density. These four parameters increased with the vertical distance from the upper edge of anode. The similarity principle was applied to explain the dependence of these parameters on the current density and the vertical distance from the upper edge of anode. (C) 2000 Elsevier Science Ltd. All rights reserved.