Rezumat
By the example of dissolution under conditions of the controbled hydrodynamics (rotating disk elec- trode) the distinctions of the surface formation resulted from the anode dissolution of the electrolytic chro- mium films in the electrolytes for the electrochemical machining (ECM) (in chlorides and nitrates at the cur- rent densities of 0.1 – 15 A/cm2) have been shown. Irregularity of the produced surface was not considered intrinsic and was correlated with the nature of the solution anion. In the chlorides it was characterized by the fracture formation due to weakening of the surface and pitting-formation, while in nitrates it was actually only pitting-formation. The influence of the current density and the chromium film surface heating at high current densities, alongside with the dimensions of the layers remaining after the chromium film dissolution, on the degree of the surface weakening and its irregularity has been shown. Expedience of the nitrate solu- tions use at the electrolyte flow high velocities during the electrochemical micro processing of such surfaces has been demonstrated.