Fluorocarbon spraying method for aluminum alloy profile

Abstract

The invention discloses a fluorocarbon spraying method for an aluminum alloy profile. The fluorocarbon spraying method comprises the process steps of dust removal, degreasing treatment, pickling activation treatment, hot galvanizing, chromium passivation treatment, suspension polishing, primer layer spraying, first-time curing, finishing paint layer spraying and second-time curing. The sprayed primer layer comprises the following raw materials of, by weight, 10-20 parts of ethyl acetate, 30-60 parts of thermoplastic acrylic resin, 3-5 parts of diethylene glycol monoethyl ether, 10-20 parts of magnesium powder, 0.5-3 parts of propylene glycol methyl propyl ether, 0.5-2 parts of diethylene glycol monoethyl ether and 0.05-0.5 part of polydimethylsiloxane. The sprayed fluorocarbon finishing paint layer comprises the raw materials of, by weight, 5-20% of a mixture, subjected to surface modification through a silane coupling agent, of nanometer titanium dioxide and alumina, 20-30% of fluorocarbon primers and 40-60% of paint thinners. According to the aluminum alloy profile produced by the fluorocarbon spraying method, the overall appearance quality is good, the good anti-corrosion effect is achieved, the adhesive ability is high, toxic substances are not generated, and the environment is not polluted.

Description

technical field [0001] The invention belongs to the technical field of spraying technology, and in particular relates to a fluorocarbon spraying method for aluminum alloy profiles. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of science and technology and industrial economy, the demand for aluminum alloy welded structural parts is increasing. Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel, good plasticity, can be processed into various profiles, and has excellent electrical and thermal conductivity. Aluminum alloy profile is a widely used building decoration material. In the existing technology, in order to prevent the oxidation of aluminum alloy profile and prolong the service life of aluminum allo...

AI Technical Summary

Problems solved by technology

Aluminum alloy profile is a widely used building decoration material. In the existing technology, in order to prevent the oxidation of aluminum alloy profile and prolong the service life of aluminum alloy profile, it is necessary to spray plastic on the surface of aluminum alloy profile to improve the aluminum alloy profile. The performance of the alloy can prolong its service life. At present, the spraying process of aluminum alloys generally adopts the more advanced fluorocarbon spraying technology. The carbon spraying technology has the advantages of high efficiency, environmental protection, economy, and powder recyclability. It is an alternative liquid The ideal method of spraying, however, in the existing fluorocarbon spraying technology process, due to the unreasonable use of spraying technology and spraying materials, the existing fluorocarbon powder spraying process is still not widely used, the reason is one On the one hand, the bonding force between fluorocarbon powder and the surface of the aluminum profile is small, and it is difficult to form a fluorocarbon coating with strong adhesion; on the other hand, the price of fluorocarbon resin is high, and the aluminum profile sprayed with ordinary fluorocarbon powder is expensive. Customers are not easy to accept. Third, the fluorocarbon coating after spraying is affected by environmental factors after long-term use. The fluorocarbon coating is easy to fall off, and the surface of the aluminum alloy profile is easy to corrode and damage.