Surface passivation treatment agent for aluminum profile

Abstract

The invention discloses a surface passivation treatment agent for an aluminum profile. The surface passivation treatment 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, 0.4-0.5 part of polyvinyl formal, 0.04-0.08 part of dodecyl phosphate ester, 0.2-0.4 part of potassium zirconium carbonate, 0.9-1.2 parts of kaolin, 0.2-0.4 part of ferric chloride and 100-130 parts of deionized water. The process formula is non-poisonous and environment-friendly, ingredients are simple, preparing is convenient, and the treatment process is simple; and the passivation and corrosion prevention effect is good, and actual production is facilitated.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to an aluminum profile surface passivation treatment agent. Background technique [0002] Aluminum is one of the most widely used non-ferrous metals. It has the characteristics of light weight, high mechanical properties, good thermal conductivity 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 due to the addition of high temperature during the molding process. At the same time, the aluminum alloy profile will be contaminated with a lot of oil, dust and other pollutants during transportation and storage. The existence of the molten metal will hinder the good bonding between the molten metals, form inclusions, and at the same time absorb the moisture in the air to destroy...

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