| 摘要 |
PURPOSE: A composition for antifreezing liquid/cooling liquid is provided to suppress the formation of thick oxidation film on the surface of aluminum and aluminum alloy, to improve high temperature anticorrosion of a aluminum material, and to prevent the darkening of the aluminum material. CONSTITUTION: An antifreezing liquid composition comprises glycol-based antifreeze agent 90-98 weight%, C4-C18 organic carboxylic acid or its alkaline salt 1-5 weight%, phosphoric acid or phosphate 0.05-1 weight%, azole derivative 0.01-1 weight%, barium or barium compound 0.0005-1 weight% and alkali metal hydroxide 0.5-2 weight%. The glycol-based antifreeze agent is selected from ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerine, triethylene glycol, and tripropylene glycol. |
