ZINC COATING PRODUCTION METHOD Russian patent published in 1995 - IPC

FIELD: electroplating. SUBSTANCE: two layer deposition of zinc is exercised with pH of 4.8 5.6, temperature of 15 -40 C and current density of 0,5-5,0 A/dm² from electrolyte with concentration, g/l, of: zinc salt 18 23 (in terms of metal), ammoniumchloride 180 200, boric acid 20 -25, polyethyleneglycol (ПЭГ-115) 5 8, sulfirol=8 1 2, and then, using the same mode, from electrolyte with concentration, g/l, of: zinc salt 29 34 ( in terms of metal), ammonium chloride 180 200, boric acid 20 25, gydropol=200 3 5, glycerin tar 5 8, sulfirol8 or СВ=105 12. EFFECT: improved quality of zinc coating. 2 tbl