Color-coated coils use hot-dip galvanized sheets, hot-dip galvalume sheets, electro-galvanized sheets, etc. as substrates. After surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coatings are coated on the surface, and then A product that is baked and solidified. Colored steel coils are named after being coated with organic coatings of various colors, referred to as color-coated coils.
Color-coated steel strips using hot-dip galvanized steel strips as the base material are protected by a zinc layer. The organic coating on the zinc layer plays a covering and protective role to prevent the steel strips from rusting. The service life is longer than that of galvanized strips, about 1.5 times.
Only by adopting appropriate coating methods can color-coated rolls that meet the requirements be produced. In order to ensure good adhesion between the paint and the surface of the galvanized sheet, the surface of the color-coated sheet needs to be chemically treated. First remove the oil and dirt attached to the surface of the color-coated roll, otherwise it will affect the adhesion of the coating, so degreasing and cleaning are required.
This is followed by chemical conversion treatment. The usual method is to create a layer of composite oxide on the galvanized surface or to perform phosphating treatment. The former has good paint film adhesion, and the latter has good corrosion resistance. After chemical conversion treatment, it must be fully dried and painted in a moisture-free state.
Appropriate coating methods can produce color-coated rolls that meet the requirements. In order to ensure good adhesion between the paint and the surface of the galvanized sheet, the surface of the color-coated sheet needs to be chemically treated. First remove the oil and dirt attached to the surface of the color-coated roll, otherwise it will affect the adhesion of the coating, so degreasing and cleaning are required.
For chemical conversion treatments, common methods are to produce a layer of complex oxides on the galvanized surface or to perform phosphating treatments. The former has good paint film adhesion, and the latter has good corrosion resistance. After chemical conversion treatment, it must be fully dried and painted in a moisture-free state.
Color coated roll uses:
Color-coated rolls are lightweight, beautiful and have good anti-corrosion properties, and can be processed directly. The colors are generally divided into gray and white, sea blue and brick red. They are mainly used in the advertising industry, construction industry, home appliance industry, electrical appliance industry, furniture industry and transportation. Industry.
The coating used for color-coated rolls selects appropriate resins according to different use environments, such as polyester silicon-modified polyester, polyvinyl chloride plastisol, polyvinylidene chloride, etc. Users can choose according to their usage.
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