Aluminum alloy surface treatment agent with effects of corrosion resistance and color fixation

Abstract

The present invention discloses an aluminum alloy surface treatment agent with effects of corrosion resistance and color fixation, wherein the aluminum alloy surface treatment agent is prepared from the following raw materials by weight: 0.5-1 part of benzotriazole, 5-6 parts of cerous nitrate, 1-2 parts of sodium fluoride, 1.5-2 parts of hydrogen peroxide, 20-24 parts of vinyl triethoxysilane, 1-2 parts of polyvinyl alcohol, 1-2 parts of nanometer titanium dioxide, 2-3 parts of nanometer zirconium dioxide, 5-6 parts of aqueous polyurethane, 0.5-0.6 part of magnesium aluminum silicate, 4-5 parts of a silicone-acrylic emulsion, 0.6-0.7 part of sodium aluminate, 0.3-0.5 part of sepiolite powder, 0.5-0.6 part of silicon nitride, 0.4-0.7 part of sodium N-lauroylsarcosinate, and 100-130 parts of deionized water. According to the present invention, with the aluminum alloy surface treatment agent, oxides, grease and the like on the aluminum surface can be removed, and a layer of the protection film can be form on the aluminum alloy surface so as to provide the effects of corrosion delaying, color fixation, brightening, and the like; and the preparation process is simple, and is worthy of promotion.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to an aluminum alloy surface treatment agent with anti-corrosion and color-fixing effects. Background technique [0002] Aluminum is one of the most widely used non-ferrous metals. It has the characteristics of light weight, high mechanical performance, good thermal and electrical conductivity, and corrosion resistance in the atmosphere. It is widely used in petroleum, aviation and light industry and other fields. Due to the relatively active nature of aluminum, a dense aluminum oxide film is formed on the surface when high temperature is applied during the forming process. At the same time, aluminum alloy profiles will be contaminated with a lot of oil, dust and other pollutants during transportation and storage. The presence of the molten metal will hinder the good combination between the formation of inclusions, while absorbing moisture in the air to destroy the contin...

AI Technical Summary

Problems solved by technology

Since the 1990s, some people have used it in metal surface protection, and found that silane coupling agent has a better metal protection effect, but the silane superhydrophobic film is uniform and dense, which can effectively prevent the invasion of corrosive media, but this The durability of the film-like layer is poor, and once it is damaged, the entire film layer will quickly fail. As a cathodic corrosion inhibitor, the rare earth conversion film has the advantages of high bonding strength and good durability, but it is prone to cracks, which affects the corrosion resistance. The invention adopts rare earth and siloxane composite film to achieve complementary advantages, and provides an effective, efficient and environmentally friendly process method for aluminum corrosion protection