1. Hot dip galvanized substrate
The product obtained by coating an organic coating on a hot-dip galvanized steel sheet is a hot-dip galvanized color-coated plate. In addition to the protective effect of zinc, the hot-dip galvanized color-coated plate also protects against rust and has a longer service life than hot-dip galvanized sheet. The zinc content of the hot-dip galvanized substrate is generally 180 g/m2 (double-sided), and the galvanizing amount of the hot-dip galvanized substrate for external use is 275 g/m2.
2. Hot-dip aluminum-zinc substrate
A hot-dip aluminum-zinc plate (55% Al-Zn) is used as a new coated substrate, usually containing an aluminum-zinc content of 150 g/m2 (double-sided). The corrosion resistance of hot-dip aluminum-zinc sheets is 2-4 times that of hot-dip galvanized sheets. Continuous or intermittent use at temperatures up to 490 ° C does not cause severe oxidation or scale formation. The ability to reflect heat and light is twice that of hot-dip galvanized steel sheets, and a reflectance greater than 0.75 is an ideal building material for energy savings.
3. Electroplated galvanized substrate
The electro galvanized sheet is used as the substrate, and the product obtained by baking with the organic coating is an electro galvanized color coated plate. Since the zinc layer of the electro galvanized sheet is thin, the zinc content is usually 20/20 g/m2, so the product is not suitable for use. Make walls, roofs, etc. outdoors. However, due to its beautiful appearance and excellent processing properties, it can be mainly used in home appliances, audio, steel furniture, interior decoration and so on.