CORROSION INHIBITOR FOR ANTIFREEZES Russian patent published in 1998 - IPC

FIELD: chemical industry, more particularly, cooling systems in internal combustion engines, and heat carriers in heat exchange apparatus. SUBSTANCE: corrosion inhibitor comprises, wt%: 87-% orthophosphoric acid, 7.5-8.0; potassium hydroxide, 7.7-8.5; sodium carbonate, 0.40-0.06; 2- mercaptobenzthiazole alkali metal salts, 0.25-0.50; trilone B, 0.20-0.25; decahydrate sodium sulfate, 0.01-0.05; and ethylene glycol, the balance. Corrosion inhibitor for antifreezes has high protecting properties with respect to all constructional engine materials, is resistant to hard water and ecologically safe. EFFECT: improved properties of the corrosion inhibitor for antifreezes. 3 tbl