Aluminum alloy surface treating agent

Abstract

The invention discloses an aluminum alloy surface treating agent. The agent is composed of the following raw materials in parts by weight: 15 to 20 parts of silane coupling agent KH550, 0.8 to 1 part of flaxseed gel, 0.3 to 0.5 part of catechol, 2 to 3.5 parts of polyvinyl alcohol, 0.2 to 0.4 part of 2,2-dimethylolpropionic acid, 1 to 2 parts of sodium citrate, 0.1 to 0.2 part of ammonium zirconium carbonate, 0.1 to 0.2 part of castor oil, 0.04 to 0.1 part of boron nitride, 1 to 1.7 parts of diacetone acryloamide, 1 to 2 parts of 1,4-cyclohexanedimethanol, 0.8 to 2 parts of 2-octyl-2H-isothiazol-3-one, 2 to 4 parts of film-forming auxiliary agent, and 100 to 150 parts of deionized water. The surface treating agent can form a stable membrane on an aluminum alloy surface. The membrane has an excellent corrosion and impact resistant performance, can improve the adhesive force of workpiece surface, and protects the aluminum alloy surface.

Description

technical field [0001] The invention mainly relates to the field of surface treatment, in particular to an aluminum alloy surface treatment agent. Background technique [0002] 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 corrosion resistance 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. Ca...

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 corrosion resistance 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 nitrite and nitrite are very serious environmental pollution, 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