The quality influence factors of color coated steel: coating

In addition to the substrate and substrate coating, the more important thing for selecting color coated steel is the coating. Coating is the protective layer of cladding material.

As long as the coating is not damaged, it is impossible to affect the substrate inside the coating.

The main function of coating reflected in visual effects and protection functions. Its painting can be divided into organic coatings and inorganic coatings. The organic coatings have bright color. The inorganic coatings are generally light-colored. And it has better chemical properties and resistance to UV performance than organic coatings. The common top paint types of color coated steel are PE, SMP, HDP and so on.

The commonly used type of color coated steel in Powerson Metal is PE top paint. Different types of top paint have some difference in hardness, adhesion and durability, and users can purchase based on these aspects.

The coating of prepainted galvanized steel coil divides to top paint coating and bottom paint coating. For the choice of bottom paint, epoxy resin is better if users emphasis on adhesion and corrosion resistance. Then if the users concerned more about the flexibility and UV resistance, then select the polyester bottom paint or polyurethane bottom paint.