Degreasing and deoiling agent for aluminum surface

Abstract

The invention discloses a degreasing and deoiling agent for an aluminum surface. The degreasing and deoiling agent is prepared from, 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 triethoxyvinylsilane, 1-2 parts of polyving akohol, 1-2 parts of nanometer titania, 2-3 parts of nanometer zirconium dioxide, 5-6 parts of waterborne polyurethane, 0.2-0.3 part of didodecyldimethylammonium bromide, 1-2 parts of clay, 0.06-0.1 part of graphite, 0.05-0.1 part of molybdenum disulfide, 0.1-0.2 part of hydrolytic polymaleic anhydride, 0.4-0.6 part of propanediol butyl ether and 100-130 parts of deionized water. The prepared deoiling agent is simple in process, low in cost, capable of achieving normal-temperature treatment, high in treatment speed and film formation efficiency and capable of meeting industrial production requirements.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to an aluminum surface degreasing and degreasing agent. 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 continuity and uniformity of the metal, t...

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