Anticorrosion and antibacterial aluminium alloy surface treating agent

Abstract

The invention discloses an anticorrosion and antibacterial aluminium alloy surface treating agent which comprises a component A and a component B, wherein the component A comprises the following materials in parts: 0.5-1 part of benzalkonium bromide, 0.4-1 part of flaxseed gum, 0.4-1 part of sodium N-lauroylsarcosinate, 2-4 parts of diethylene glycol, 3-4 parts of sodium phosphate, 0.9-1.5 parts of 3-methoxybutyraldehyde dimethyl acetal, 2-3 parts of glycerinum, 2-3 parts of silane coupler KH-858 and 40-50 parts of deionized water; the component B comprises the following materials in parts: 0.4-1 part of 1-methyl-2-pyrrolidinone, 1-2 parts of potassium iodide, 0.3-1 part of bone black, 1-2 parts of ammonium polyphosphate, 0.3-0.6 part of magnesium fluoride, 2-4 parts of a coalescing agent, 10-12 parts of a silane coupling agent KH560 and 70-90 parts of deionized water. According to the invention, a film formed on the surface of aluminium alloy by the surface treating agent is excellent in corrosion resistance, antibacterial property, acid-base resistance, salt frog resistance and high in rust resisting property; the film layer is firm, excellent in compactness, uniform in shape and high in adhesive force.

Description

[0001] technical field [0002] The invention mainly relates to the field of surface treatment, in particular to an anti-corrosion and antibacterial 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-corrosion and antibacterial 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 me...

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-corrosion and antibacterial properties 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. and sub-corrosion and antibacterial carcinogens, which pollute the environment very seriously, 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 application fields. Salt passivation treatment is the latest development direction of metal surface protection alone