Antirust aluminum alloy surface treating agent

Abstract

The invention discloses an antirust aluminum alloy surface treating agent. The agent is composed of an A component and a B component; wherein the A component is composed of the following raw materials in parts by weight: 1 to 1.2 parts of tara gum, 0.3 to 1 part of hydroxyethyl methacrylate phosphate, 1 to 2 parts of chitosan, 2 to 3 parts of butynediol, 2 to 3 parts of 2-ethylhexoic acid, 5 to 6 parts of silane coupling agent KH550, and 50 to 60 parts of deionized water; and the B component is composed of the following raw materials in parts by weight: 1 to 2 parts of cetyltrimethyl ammonium chloride, 2 to 3 parts of succinic anhydride, 0.4 to 1 part of sodium monofluorophosphate, 1 to 2 parts of dipropylene glycol, 0.4 to 1 part of plant ash, 1 to 2 parts of polyurethane, 2 to 4 parts of film-forming auxiliary agent, 6 to 8 parts of 3-aminopropyltriethoxysilane, and 50 to 60 parts of deionized water. The surface treating agent has a very good antirust effect, can protect workpiece from rust and corrosion in severe environment of high acidity and humidity for a long term, and is capable of forming a surface membrane which has the advantages of good surface resistance and long-lasting protectiveness.

Description

[0001] technical field [0002] The invention mainly relates to the field of surface treatment, in particular to an anti-rust aluminum alloy surface treatment agent. Background technique [0003] There are many surface treatment methods for aluminum alloys, such as physical methods, chemical methods, physicochemical methods, and comprehensive methods. The commonly used method is anodic oxidation method, which forms a conversion film on the surface of aluminum alloy by electrochemical method. Although this method can improve the anti-rust performance of aluminum alloy, its ability to adapt to the environment is poor, and the conversion film layer is not uniform enough and easy to fall off. , the wear resistance has not been improved, and the traditional phosphate conversion and chromate passivation surface treatment technology can obtain good results, but the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chro...

AI Technical Summary

Problems solved by technology

The commonly used method is anodic oxidation method, which forms a conversion film on the surface of aluminum alloy by electrochemical method. Although this method can improve the anti-rust performance of aluminum alloy, its ability to adapt to the environment is poor, and the conversion film layer is not uniform enough and easy to fall off. , the wear resistance has not been improved, and the traditional phosphate conversion and chromate passivation surface treatment technology can obtain good results, but the waste liquid discharged during the treatment process contains heavy metal ions such as zinc, manganese, nickel, chromium, etc. Carcinogens such as anti-corrosion and anti-rust are very serious to the environment, and the metal surface silanization treatment technology is considered to be expected to replace phosphate conversion treatment and chromium because it does not involve substances that are harmful to the environment, the production process has low energy consumption, and the technology has a wide range of applications. Salt passivation treatment is the latest development direction of metal surface protection alone