Antifreeze formulation useful for retarding precipitation of aluminum corrosion products in the cooling systems of internal combustion engines

摘要

Precipitation of aluminum corrosion products from phosphate-borate ethylene glycol based antifreeze formulations is retarded by incorporating in the antifreeze a precipitation retarding amount of alkylene diphosphonic acid, e.g., 1-hydroxyethylidene-1,1-diphosphonic acid.