Phosphorus-free multi-effective antifreeze solution

Abstract

The invention discloses a phosphorus-free multi-effective antifreeze solution, comprising the following components by mass percent: 35-90% of ethylene glycol, 0.05-1% of sodium molybdate, 0.4-2.5% of sodium nitrate, 0.3-0.9% of benzotriazole, 0.5-3.6% of sebacic acid, 0.25-3% of undecanedioic acid, 0.05-0.5% of hydrolyzed polymaleic anhydride, 0.001-0.005% of antifoaming agent and the balance deionized water. The invention has the advantages that a phosphate radical free formula system is adopted; in the formula, the sodium molybdate and the organic acid cooperate to protect the metal, and the sodium nitrate is used to assist to provide durable metal corrosion for a long-term; and a great amount of sebacic acid is used in the formula so as to take good addition effect on the corrosion of the metal.

Description

technical field

[0001] The invention relates to an antifreeze system for all-round multi-layer protection of an automobile cooling system, in particular to a phosphorus-free multi-effect antifreeze. Background technique

[0002] Antifreeze is a liquid with a low freezing point. The aqueous solution containing a certain amount of ethylene glycol will not freeze at low temperatures. It has good fluidity and can take away a large amount of heat generated by the engine during operation. It can be used all year round. Used in automobile antifreeze water cooling system, it has the advantages of anti-boiling, anti-corrosion, anti-scaling, anti-freezing, and anti-evaporation loss.

[0003] According to the evaluation of the impact on the environment, the types of antifreeze can be divided into environmentally friendly pure organic acid antifreeze and low-grade inorganic salt antifreeze. Pure organic acid antifreeze is environmentally friendly and easy to biodegrade, but the cost of ...