Epoxy powder anti -corrosion steel pipes have been widely used in developed countries and are more old. Epoxy powder has always been applied to use electrostatic spraying process. Because the epoxy powder soaking process is troubled by the adhesion, the soaking of epoxy powder has not been widely used. In recent years, with the successful development of epoxy powder soaking fluoroscopic fluid, it has dominated the adhesion problem of epoxy powder soaking technology, and the emerging process of soaking plastic in epoxy powder has begun to implement.
Use electrostatic spray coating process to apply epoxy powder coatings to form a film at a time. This epoxy powder coating is a thermosettic coating, which is made of solid epoxy resin, curing agent and various additives. Before spraying paint, the steel pipe is treated and preheated through the shot of shot blasting, and then the electrostatic spray coating method is used to spray the epoxy powder coating on the surface of the heated steel pipe, bonded to the appearance of the steel pipe, and solidify the coating.
FBE coatings are generally a one -time film -forming structure Epoxy powder coating. The production material contains: the epoxy volume between the epoxy volume and the relatively narrow solid epoxy resin, under the conditions of natural temperature Curburizers, catalysts and catalysts, in addition, ascitatives and padding.
Epoxy powder coating: The density structure of the coating determines its strong anticorrosiveness. The polar structure of the superior epoxy molecule of spiral steel pipes determines its strong attachment and is a well -preserved coating. It is only thin and crispy in coating. It is very likely that mechanical injury is very likely during the lifting, transportation, and stacking process, and the epoxy structure is very poor. It is not suitable for the outer wall and the outer surface of the pipeline.
Although polyethylene and epoxy have excellent corrosion resistance, polyethylene is a thermoplastic substance, with good flexibility and resistance to bumps. Because the adverse polar molecules and steel pipe adhesion is poor, epoxy resins are polar molecules. At the temperature, it is easy to respond to the steel pipe, and the adhesion is extremely strong, but because it is armosetable, it is not resistant to bumps.
Therefore, the combination of the two materials belongs to the current combination of the anticorrosive industry. The coating steel pipe industry has developed from the early internal and external polyethylene. Due to adhesion, it has developed to the internal and external epoxy, but the outer oxygen layer is not tolerated. Later Based on the problem of adhesion, it is upgraded to 3PE's anticorrosive melting epoxy powder internal anticorrosive pipeline.
