| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: electrolyte contains, g/l: chrome anhydride 70-100, sulphuric acid 0.7-1.0, indigo colourant 0.1-1.0, stroncium chloride 30-70. Electrolyte contains, g/l: chrome anhydride 70-100, sulphuric acid 0.7-1.0, indigo colourant 0.1-1.0, stroncium chloride 30-70, and at least one acid out of molybdic, vanadic, niobic, tantalic, tungstic, permanganic, technetic or rhenic acid 50-90. ^ EFFECT: enhanced microhardness and heat resistance of coatings, prolonged lifetime. ^ 2 cl, 3 tbl |
