Corrosion resistant aluminum alloy surface treatment agent

Abstract

The invention discloses a corrosion resistant aluminum alloy surface treatment agent, which is composed of the following raw materials by weight: 0.7-1 part of propyl gallate, 4.2-5 parts of fluoride sodium borate, 1-1.6 parts of calcium aluminate, 2-3.1 parts of sodium alginate, 0.2-0.4 parts of bauxite powder, 1-1.3 parts of xanthan gum, 2-3.1 parts of toluene-p-sulfonic acid, 0.2-0.4 part of methyl hydroxypropyl acrylate, 0.1-0.2 part of trimethylolpropane diallyl ether, 2-3.5 parts of tetradecanedioic acid, 3-4.1 parts of glycerol, 1-3 parts of a coalescent, 16-20 parts of a silane coupling agent KH560 and 110-140 parts of deionized water. The surface treatment agent provided by the invention can form a strong protective film on the aluminum alloy surface to enhance the corrosion resistance of the substrate; the surface treatment agent provided by the invention does not contain carcinogenic substances such as nitrate and nitrite; and waste liquid can be discharged through simple neutralization treatment, so as to reduce energy consumption.

Description

[0001] technical field [0002] The invention mainly relates to the field of surface treatment, in particular to a corrosion-resistant 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 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, nick...

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. and sub-corrosion-resistant 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 applications. Salt passivation treatment is the latest development direction of metal surface protection alone