Hot-dip galvanized substrate: The product obtained by coating organic paint onto hot-dip galvanized steel sheet is called hot-dip galvanized color-coated sheet. In addition to the protective effect of zinc, the organic coating on the surface of hot-dip galvanized color-coated sheet also provides isolation protection and prevents rust, resulting in a longer service life than hot-dip galvanized sheet. The zinc content of hot-dip galvanized substrate is generally 180g/m² (double-sided), with the highest zinc content for exterior building hot-dip galvanized substrate reaching 275g/m².
Hot-dip aluminized zinc substrate: Using hot-dip aluminized zinc steel sheet (55% Al-Zn) as the new coating substrate, the aluminum and zinc content is typically 150g/m² (double-sided). The corrosion resistance of hot-dip aluminized zinc sheet is 2-5 times that of hot-dip galvanized sheet. It will not oxidize severely or form scale even with continuous or intermittent use at temperatures up to 490℃. Its ability to reflect heat and light is twice that of hot-dip galvanized steel sheet, with a reflectivity greater than 0.75, making it an ideal energy-saving building material.
Electro-galvanized substrate: Electro-galvanized color-coated steel sheet is produced by coating an electro-galvanized sheet with an organic paint and baking it. Because the zinc layer of electro-galvanized sheet is thin, typically containing 20/20 g/m², this product is not suitable for outdoor use in wall and roof construction. However, due to its attractive appearance and excellent processing performance, it is mainly used in home appliances, audio equipment, steel furniture, and interior decoration.
