| abstract |
FIELD: chemical engineering. SUBSTANCE: invention concerns nickelizing steel parts operated under conditions of invasive media, high pressures and temperatures. Method includes preparation of nickelizing solution, preparation of part surfaces, applying nickel coating from electrolyte containing (in g/l): nickel sulfate, 21; sodium hypophosphite, 24; sodium acetate, 10; and maleic anhydride. Process is controlled with assistance of samples-witnesses. Applied coating is washed with cold and hot water, dried, and thermally treated. EFFECT: improved procedure. 6 cl, 2 dwg, 2 tbl |