Metal treatment agent for automotive radiator aluminium alloy heat exchanger

Abstract

The invention discloses a metal treatment agent for an automotive radiator aluminium alloy heat exchanger. The metal treatment agent is prepared from the following raw materials (by weight): 0.3-0.5 parts of aluminum distearate, 40-50 parts of polyvinyl alcohol, 12-15 parts of polyethylene glycol, 0.4-0.6 part of an emulsifier op10, 0.3-0.5 part of glycerol, 0.6-0.8 part of triethanolamine, 6-8 parts of benzotriazole, 6-7 parts of sodium benzoate, 2-3 parts of sodium dodecyl sulfate, 0.4-0.6 part of butanediol, 4-5 parts of nanocellulose, 3.3-4 parts of paraffin, 0.3-0.5 part of Tween 80, 0.7-0.9 part of nano-silica, 1.1-1.3 parts of nanometer titanium dioxide, and a proper amount of deionized water. The metal treatment agent contains no solvent, meets environmental requirements, has high water resistance, oil resistance, temperature resistance, abrasion resistance and stripping performance, can also be used for surfaces of metal, stripping, plastic and the like simultaneously, and has a temporary rust protection effect.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment agents, in particular to a metal treatment agent for an aluminum alloy heat exchanger of an automobile water tank. Background technique [0002] According to statistics, every year in the world, steel products with a total weight equivalent to 10-20% of the annual metal output cannot be used due to corrosion, rust and other reasons. For this reason, people have adopted various anti-rust methods to avoid rust and reduce loss. There are various kinds of antirust agents, among which sodium nitrite has been favored and widely used because of its excellent antirust performance and low price. A lot of research and development work has been carried out, and a variety of alkyl, alkoxy, halo, naphthoic acids and their derivatives, nitrobenzoic acids, and borates, borates, and molybdates have been prepared. The main material to replace the new water-soluble rust inhibitor of sodium nitrite...

AI Technical Summary

Problems solved by technology

[0003] Guo Jun proposed in the article "Development of PVA Water-Soluble Polymer Peelable Antirust Film" that by adding antirust agent and other additives to polyvinyl alcohol, it is placed in a beaker in a constant temperature water bath at a temperature of 99°C. Heating in middle temperature until completely dissolved, and then uniformly coating it on the metal surface by coating casting method, drying to form a film, and measuring the performance of the film. The experimental results show that the surface has good rust resistance. In cold water below 40 ° C, almost It is completely insoluble in water, but when placed in hot water above 40°C, the film will gradually become soft and thin, and finally dissolve completely, so the application area is limited