Abstract
The problem of the evaluation of the degree of process localization during the anodic dissolution intensification of copper at the electrochemical machining (ECM) under conditions of mechanical and hydrodynamic activation is considered. The processes of hydrodynamic effect of electrolyte jet directed along and perpendicular to the surface of the anode and the effect of mechanical anode stripping on electrochemical dissolution of copper are shown. The results of evaluation of the degree of localization of the copper dissolution process in 5% KCl under hydrodynamic drag of electrolyte jets directed perpendicular to the surface of the anode during the hydrodynamic drag of the jet of electrolyte, moving along the surface of the anode, and also under condition of mechanical renovation of treated anode surface, are presented. Studies have revealed the nature of the anodic dissolution of copper at the above mentioned methods of activation of ECM process. A quantitative assessment of the degree of the process localization at different methods of intensification of anodic dissolution of copper is given. It is found that under the hydrodynamic drag of electrolyte jet directed perpendicular to the surface of the anode, the maximum degree of localization is equal to L = 350. When the mechanical process intensification passivation films are removed from the anode surface, but diffusion limitations does not eliminates. As a result, the current density decreases, resulting in lower degree of localization to L = 90. In the hydrodynamic drag of the jet of electrolyte, moving along the surface of the anode is achieved by the minimum value of the degree of localization of L = 45, due to the insufficient level of force impact of the electrolyte jet to completely removal passivating films.
Keywords: Electrochemical processing, passivation of metal, intensification of the process, the degree of localization, copper, potential, current density, activation of a surface.
References
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