| 摘要 |
FIELD: chemistry.SUBSTANCE: solution contains components in the following ratio, g/l: sodium bichromate 45.0-48.0, sulphuric acid 55.0-60.0, nitric acid 390.0-400.0, compounds containing fluoride ions 55.0-60.0, compounds containing ammonium ions with respect to the pure substance 40.0-50.0, cobalt sulphate 1.0-5.0.EFFECT: invention provides high adhesion and ornamentality of the coating, moisture resistance, corrosion resistance, high manufacturability, capacity to recreate a passive film in case of mechanical damage to the coating. |
