The structure of PPGI (Pre-Painted Galvanized Iron) mainly consists of two parts: substrate and coating. The substrate is usually galvanized steel sheet, while the coating is formed by covering the surface of the galvanized steel sheet with a layer of colored paint.
Substrate
The substrate of PPGI is galvanized steel sheet, which is covered with a layer of zinc on the surface of the steel sheet through a hot-dip galvanizing process to provide corrosion protection. Galvanized steel sheet has good corrosion resistance, especially in humid or corrosive environments.
Coating
The coating is made by covering the galvanized steel sheet with colored paint. These coatings not only retain the corrosion resistance of the galvanized steel sheet, but also give the product rich colors and beautiful appearance. The choice of coating can be diversified according to the needs to meet different application scenarios and aesthetic needs.
Application field
Because PPGI has the characteristics of both corrosion resistance and colorful appearance, it is widely used in construction, decoration and home appliances. For example, PPGI is often used to make roofs, wall panels and decorative panels, etc., which can meet various construction and decoration needs.
