Automotive antifreezing coolant

Abstract

The invention discloses an automotive antifreezing coolant, which comprises antifreeze, corrosion inhibitor, scale inhibitor, mildew preventive, buffer, defoamerer and the like. The automotive antifreezing coolant is characterized in that the automotive antifreezing coolant contains 85 wt. percent to 98 wt. percent of liquid dihydric alcohol, 0.1 wt. percent to 10 wt. percent of water, 0.01 wt. percent to 5.0 wt. percent of azole compound, 0.01 wt. percent to 3.0 wt. percent of silicate, 0.01 wt. percent to 0.1 wt. percent of silicate stabilizer, 0.001 wt. percent to 3.0 wt. percent of molybdate, 0.01 wt. percent to 0.5 wt. percent of buffer, 0.01 wt. percent to 0.005 wt. percent of colourant, 0 wt. percent to 0.1 wt. percent of defoamerer, 0.1 wt. percent to 4 wt. percent of diethylene triaminepentaacetic acid pentasodium salt, 0.01 wt. percent to 5 wt. percent of polyepoxysuccinic acid salt and 0 wt. percent to 3 wt. percent of phosphonium salt. The automotive antifreezing coolant has the advantages of effective scale inhibition, long-acting sterilization, mildew growth inhibition and water tank system protection, each metal corrosion index can meet requirement, and in particular, electrochemical corrosion experiment data indicates that the automotive antifreezing coolant has a better anti-corrosion effect on cast iron, cast aluminum and brass.

Description

Technical field [0001] The invention relates to an antifreeze cooling liquid, and more particularly to an antifreeze cooling liquid for automobiles with an inorganic salt compound polyol formula. Background technique [0002] Automobile antifreeze coolant should have cold and thermal stability and not easily volatility. At the same time, consideration must be given to frost resistance, anti-corrosion, anti-scaling, low volatility, and environmental protection. Generally, the antifreeze coolant for automobiles consists of antifreeze, corrosion inhibitor, defoamer, colorant, antifungal agent, buffer and so on. Existing literature records a large number of technologies related to polyol-type automotive antifreeze coolants. [0003] The anticorrosive and antifreeze composition reported by CN1498938A mainly includes ethylene glycol, deionized water, preservatives, phenylpropyltriazole, triethanolamine, phosphoric acid, and defoaming agent, characterized in that the preservative is diso...

AI Technical Summary

Problems solved by technology

Borates corrode aluminum metal cylinder heads and cylinder gaskets, and their corrosion products block radiators and cause overheating failures

Phosphate also corrodes aluminum metal in heat transfer state. Although the antifreeze solution containing phosphate also has anti-corrosion effect at low temperature, the phosphate film will detach at a specific temperature, which will accelerate the corrosion of the metal.

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