ELECTROCHEMICAL SHAPING UNDER PARTIAL INSULATION OF THE ANODE SURFACE- THE RATE OF DISSOLUTION IN THE ZONE CLOSE TO THE INSULATION BOUNDARY

The problem of determining the profile of the anodic cavity under the condition of partial insulation of the anode surface was solved numeri cally within the framework of the model of an ideal shaping process; t he results are presented. The distribution of the dissolutions rate wi thin and outside the zone close to the insulation boundary, under galv anostatic and voltstatic dissolutions regimes, was studied experimenta lly in terms of copper dissolution in nitrate solutions. The zone in p roximity to the insulation boundary was shown, under certain condition s, to be a kind of nonpolarizable electrode; the dissolution rate in t his zone can be calculated by the model of an ideal process. A recipro cal influence of the rates of insulation-undercutting and normal-direc tion dissolution was established for a galvanostatic regime.