Glycol-free heat transfer fluid

摘要

The present invention relates to an aqueous glycol-free heat transfer fluid comprising sebacic acid, benzotriazole, morpholine, and at least one of sodium nitrite and sodium molybdate dihydrate, wherein a sum of concentrations of sodium molybdate dihydrate, sebacic acid, benzotriazole, morpholine, sodium nitrite is equal to or less than 1% (w/w). Preferably, the sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is less than 0.65% (w/w). Preferably, the respective concentration is: 0-0.134% (w/w) sodium molybdate dihydrate; 0-0.028% (w/w) sebacic acid; 0-0.028% (w/w) benzotriazole; 0.08-0.812% (w/w) morpholine and 0-0.134% (w/w) sodium nitrite.

主权项

1. A water-based glycol-free heat transfer fluid for inhibiting corrosion and protecting a pressure relief valve of an explosion-proof heater, the fluid comprising:
sebacic acid; benzotriazole; morpholine, and at least one of sodium nitrite and sodium molybdate dihydrate; wherein a sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is equal to or less than 1% (w/w), and wherein a balance of the fluid is water such that at least 99% (w/w) of the fluid is water.