Application of fluorocarbon spraying on the surface of steel structure and fireproof coating
The application of product fluorocarbon spraying on the surface of steel structures and fireproof coatings THE coating technology is a traditional process with a long history. With the advancement of science and technology, a new coating technology and new process room temperature curing fluorocarbon spraying has developed into a Modern practical industrial technology.
Normal temperature curing fluorocarbon spraying is sprayed on the surface of the object with fluorocarbon paint, but the spraying process has a great influence on the spraying effect. The test of the relevant parties pointed out that the influence of the construction process on the performance of the paint film is 49%. , Adopting a suitable coating process plays an extremely important role in increasing the adhesion of the fluorocarbon paint, exerting its protection and decoration to a greater extent, and prolonging its service life.
Surface treatment-spraying zinc-rich primer-repairing iron red anti-rust primer-spraying epoxy cloud iron middle coating-base surface treatment-spraying fluorocarbon topcoat-spraying overcoat protection varnish (1) Surface treatment: because steel products are always in contact Atmosphere, due to the effects of oxygen and water in the atmosphere and S02, co2, and h2s, corrosion is likely to occur, and the performance of the guided products is reduced or even damaged. In addition, foreign materials such as oxide scale, oil stains, processing debris, and dust can easily form or attach foreign materials during processing, storage and transportation, which will affect the adhesion and protection performance of the coating. deal with. The quality of the surface treatment before painting has a great influence on the quality of the coating. During the construction, the metal should be thoroughly derusted by sandblasting or light method to reach Sa2.5 level, and then spray zinc-rich primer , The thickness should be above 40 microns. If there is no sandblasting conditions, manual and power tools can be used to remove rust on site to achieve St3 level, that is, there is no visible grease and dirt on the steel surface, no attached oxide scales, rust and other additives, which reveals the metallic luster. After removing the floating dust on the surface with a brush or compressed air, spray the epoxy iron red anti-rust primer with a thickness of 35 microns or more.
⑵Repair the epoxy iron red anti-rust primer: repair the epoxy iron red primer at the scratched or rusty part of the weld. Epoxy iron red anti-rust primer has excellent corrosion and rust resistance, acid and alkali resistance, salt resistance, oil resistance, strong adhesion, and can be used as a steel structure anti-corrosion protective coating.
⑶Spraying epoxy cloud iron middle coating: it has excellent sealing performance, good weather resistance, chemical resistance, and strong adhesion between layers. It can block the penetration of water vapor in the air to the grassroots.
â‘· Base layer treatment: the quality of the base layer treatment directly affects the appearance of the paint film after the fluorocarbon topcoat is sprayed, because the metal-like fluorocarbon paint contains metal powder, the metal powder is arranged irregularly, and it is easy to reflect. All the defects of the base layer are exposed, so the base layer should be treated flat before spraying the fluorocarbon topcoat, and the weld is smoothed with putty to achieve the spraying effect.
⑸Sprayed fluorocarbon topcoat: The fluorocarbon topcoat is based on fluororesin and has excellent durability, long-lasting aesthetics, good flexibility, scratch resistance, strong self-cleaning, and shedding resistance.
⑹Spray overcoat protection varnish: Overcoat protection varnish is an ultra-durable fluorocarbon coating for overcoat. It has high transparency, high hardness, high fullness, strong adhesion, and can fully improve its self-cleaning, protective and decorative properties. And service life.
Fluorocarbon spraying can not only spray directly on the steel surface, but also achieve a beautiful decorative effect on the fireproof coating.
As a main form of building structure, steel structure is widely used in construction. However, the fire resistance of the steel structure is poor, and its fatal weakness is the rapid decrease in strength during the fire. The application of fire retardant coating on the outside of the steel structure is the most effective measure and an important means to solve the fire protection of the steel structure. However, there are two problems with fire retardant coatings: one is single color, the other is rough appearance and poor decoration. Sometimes in order to achieve the overall decorative effect, it is on the bread aluminum plate, but this cost is too high. Now that you have a fluorocarbon spray, you do n’t have to worry about it anymore. Use a water-based special putty that has good compatibility with the fire retardant coating to level the fire retardant coating first. After sanding and smoothing, then follow the standard process for fluorocarbon spraying (see attached picture) The surface of the rough fire-retardant coating becomes flat and bright like an aluminum plate. This process has been used in Caishikou Mobile Building, Fengshang International Apartment, Office Building of the Civil Aviation Administration and other projects.
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