High-resistant Cr-Ni alloys (steels) due to their physical and mechanical characteristics are difficult to manufacturing by traditional methods. Therefore, for manufacturing of complex profile details (for example, blades of gas turbine engines) electrochemical machining (ECM) is used. ECM is based on a high rate anodic dissolution with small interelectrode gap and high electrolyte flow rate in interelectrode gap. Using pulse ECM microsecond and nanosecond range can improve the accuracy of manufacturing and localization of process [1,2].   The report presents results of the study of pulse-galvanostatic anodic dissolution of heat resistant steel EI612 (% mass.) (Fe ~ 43, Ni ~33, Cr ~16), compared with anodic dissolution of heat-resistant alloys EI 617 and EI893 (Ni ~66, Cr ~15) in chloride, nitrate and chloride-nitrate electrolytes with the same conductivity (~ 0,15 Sm/m). Anodic dissolution was carried out until current densities 100 A/cm2 are using pulse current (PC) (pulse duration 20 µs, duty cycle 10-50%) and direct current (DC). We investigated the change of current efficiency (specific dissolution rate, mg/C) and surface roughness (Ra, µm) after dissolution on current density (PC, DC, for comparison).   It was shown that Ra reaches minimum values with increasing current density. At I ˃ 30 A/cm2 Ra ~ 0,2-0,5 µm for dissolution in chloride electrolyte, 0,4-0,7 µm for nitrate electrolyte and 0,2-0,3 µm for chloride-nitrate electrolyte. At high current densities (˃ 30 A/cm2) not observed significant differences for Ra different alloys. Significant differences in the dependence of the anodic dissolution rate on current density (for PC and DC) were observed for dissolution steel (EI612) and nickel-chromium alloys (EI893, EI617). EI893 and EI617 are dissolved with 100% current efficiency (calculated as Cr dissolved in Cr(VI) and Cr(III), see also [3]) independently of current density in all electrolytes. However at the case of  EI612 steel anodic dissolution the dissolution rate increases with current density increasing. The sharpest dependence was observed at PC with duty cycle ~10% (with increase of pause duration). The existence of such dependence is due to the influence of passivation during pause on the current efficiency during next current pulse (see also [2]).   This work was supported in part by the Academy of Sciences of Moldova (project №15.817.02.05.А) as well as Kostroma State University (Kostroma, Russia) and T.Shevchenko  Pridnestrovie State University (Tiraspol)