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Color coated coil substrate classification

Hot-dip galvanized substrate
The product obtained by applying organic coating on hot-dip galvanized steel sheet is 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 plays a role in isolation protection and rust prevention, and its service life is longer than that of hot-dip galvanized sheet. The zinc content of hot-dip galvanized substrate is generally 180g/m2 (double-sided), and the maximum zinc content of hot-dip galvanized substrate for building exterior is 275g/m2.

Hot-dip aluminum-zinc substrate
Hot-dip aluminum-zinc steel sheet (55% Al-Zn) is used as the new coating substrate, usually containing 150g/㎡ of aluminum and zinc (double-sided). The corrosion resistance of hot-dip aluminum-zinc sheet is 2-5 times that of hot-dip galvanized sheet. Continuous or intermittent use at temperatures up to 490℃ will not cause serious oxidation or scale. The ability to reflect heat and light is twice that of hot-dip galvanized steel sheet, and the reflectivity is greater than 0.75, making it an ideal building material for saving energy.

Electrogalvanized substrate
The product obtained by using electrogalvanized sheet as substrate, coating with organic coating and baking is electrogalvanized color-coated sheet. Since the zinc layer of electrogalvanized sheet is thin, the zinc content is usually 20/20g/m2, so this product is not suitable for outdoor use in making walls, roofs, etc. However, due to its beautiful appearance and excellent processing performance, it can be mainly used in home appliances, audio, steel furniture, interior decoration, etc.