FIELD: chemistry.
SUBSTANCE: cooling liquid contains, wt %: sodium nitrite 0.1-0.2, sodium nitrate 0.2-0.3, benzotriazole 1.0-2.0, ethanolamine borate 2.0-3.0, ethyleneglycol 50.0-60.0 and water - the rest.
EFFECT: improved protective properties of the liquid towards steel, cast-iron and aluminium.
1 cl, 4 tbl
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Authors
Dates
2009-10-20—Published
2008-04-11—Filed