Combinations of carboxylates for use as freezing point depressants and corrosion protection in heat-transfer fluids

摘要

An aqueous heat transfer fluid comprising a C₃ carboxylate freezing point depressant, either solely or in combination with C₃-C₅ carboxylate freezing point depressants, in combination with C₆-C₁₆ organic acid salt corrosion inhibitors, provides an antifreeze/coolant composition wherein the corrosion inhibitors exhibit uniquely enhanced solubility, especially at low temperatures, in synergistic combination with the selected carboxylate freezing point depressants.