FIELD: refrigeration engineering; heating engineering; production of the liquid operational compositions used as the intermediate refrigerant or the antifreezing heat-carrier.
SUBSTANCE: the invention is pertaining to the refrigeration engineering and the heating engineering, in particular, to the liquid operational compositions used as the intermediate refrigerant or the antifreezing heat-carrier and also at refrigeration of the engines and in air conditioning installations. The heat-transfer liquid contains 10-65 % of the propylene glycol, 0.003-0.15 % of the sodium nitrite, 0.015-0.75 % of the sodium benzoate, 0.002-0.10 % of the products of interaction of glycerin with the formic acid and the rest - the water. The invention allows to reduce the speed of the metals corrosion in the refrigerant.
EFFECT: the invention ensures the decreased speed of the metals corrosion in the refrigerant.
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| SYNERGIC CARBOXYLATE COMBINATION FOR USE AS FREEZING TEMPERATURE DEPRESSORS AND CORROSION INHIBITORS IN LIQUID HEAT CARRIERS | 2000 |
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| ADDITIVE PRESERVING FRESHNESS OF FOOD PRODUCTS | 2010 |
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