CORROSION INHIBITOR FOR ANTIFREEZES Russian patent published in 1999 - IPC

FIELD: chemical technology; applicable in cooling system of internal combustion engines, in capacity of heat carrier in heat-exchange apparatuses. SUBSTANCE: corrosion inhibitor contains, wt.%: trihydrate dipotassium phosphate, 2.5- 3.5; sodium carbonate, 0.50-0.60; salt of alkali metal of 2- mercaptobenzothiazole, 0.25-0.35; trilon B, 0.17-0.25; decahydrate sodium tetraborate, 6.5-8.5; water, 14.0-15.0; ethylene glycol, the balance. EFFECT: higher protective properties for all engine structural materials with preserved resistance to hard water and ecologically safe in its application. 3 tbl, 15 ex