Multifunctional corrosion-resistant anti-freezing solution

Abstract

The invention discloses a multifunctional corrosion-resistant anti-freezing solution. The multifunctional corrosion-resistant anti-freezing solution is prepared from, by weight, 10-30 parts of diethylene glycol, 5-10 parts of sodium molybdate, 3-10 parts of glycerol, 2-8 parts of phosphoric acid, 2-3 parts of potassium phosphate, 0.1-0.5 part of brassin, 0.3-0.5 part of vinyl acetate, 1-5 parts of sulfonated polystyrene, 1-10 parts of monopotassium phosphate and 10-20 parts of deionized water. The multifunctional corrosion-resistant anti-freezing solution has the advantages that benzotriazole and other heterocyclic compounds in the components of the corrosion-resistant anti-freezing solution and aluminum ions generated in the corrosion process on the surface of metal are interacted through reactive groups on organic inhibiter molecules to form a precipitation membrane or a insoluble complex membrane so as to achieve the corrosion inhibition effects, and the heat exchange effect of a solar system is ensured by using propylene glycol and glycerol which are not high in viscosity.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, in particular to a multifunctional corrosion-resistant antifreeze liquid. Background technique [0002] At present, there are many patent applications for antifreeze in various countries in the world. The main components are ethylene glycol and water, and preservatives, rust inhibitors, stabilizers, color dyes are added, and some anti-seepage agents are also added, such as Chinese patent 201110252501.5, But the potassium nitrite contained in the corrosion inhibitor component is harmful to human health. As far as the corrosion inhibition effect on carbon steel is concerned, chromate, especially chromate combined with polyphosphate and zinc salt, is still the most ideal corrosion inhibitor. The United States is still using it to a considerable extent. However, chromate is toxic and pollutes the environment. Therefore, it has been gradually replaced by (poly) phosphate in t...

AI Technical Summary

Problems solved by technology

According to research, rare earth is expected to become a substitute for chromate, and my country is the country with the most abundant rare earth mineral resources and a relatively complete variety in the world. However, pure rare earth is used as a corrosion inhibitor in a large amount, and the effect is not very stable.