| 摘要 |
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 |
