Anticorrosion aluminum alloy surface treating agent

Abstract

The invention discloses an anticorrosion aluminum alloy surface treating agent. The agent is composed of the following raw materials in parts by weight: 0.1 to 0.2 part of cobalt chloride, 1.6 to 2 parts of hydroxyethylidene diphosphonic acid, 0.1 to 0.16 part of tricalcium silicate, 0.4 to 1 part of malic acid, 0.7 to 2 parts of ammonium octamolybdate, 1 to 1.6 parts of borax, 0.2 to 0.4 part of magnesium sulfate, 1 to 1.7 parts of sodium pyrosulfite, 0.1 to 0.2 part of polybenzimidazole, 0.1 to 0.2 part of butyltin mercaptide, 0.1 to 0.3 part of trimethyl hydroxyethyl ethylenediamine, 2.6 to 4 parts of glycol, 2 to 3 parts of film-forming auxiliary agent, 16 to 20 parts of silane coupling agent KH560, and 100 to 140 parts of deionized water. Water is taken as the solvent, and each raw material is reasonably compounded, so the compatibility is good, and turbidity or flocculation will not be generated in the interface. Moreover, the surface treating agent has a very high adhesive performance, and the formed membrane is stable and environment-friendly.

Description

technical field [0001] The invention mainly relates to the field of surface treatment, in particular to an anti-corrosion 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, chr...

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