What is color coated steel or prepainted steel?
The color coated steel plate and coil is also named prepainted steel, it is a popular structure steel product made by cold-rolled steel plate, electro-galvanized steel plate or hot-dip galvanized steel plate as the substrate, after base plate surface is degreased, phosphatized, chromate treated, coated with organic coating and baked, it is usually made of cold-rolled steel plate. Color-coated boards that are used as substrates are often applicated in indoor low-corrosion environments such as furniture. Color-coated boards with electro-galvanized steel plates are commonly used in home appliances industries and interiors that require high leveling, and hot-dip galvanized steel is used as the substrate. The color coated steel plate is mainly used in the construction industry due to its strong corrosion resistance.
The color coated steel plate is a composite material composed of a base plate and a coating material, which has the characteristic advantages of both the steel plate and the organic material, and has both the mechanical strength and the easy molding property of the steel plate, usually organic material has good decorativeness and corrosion resistance. The coating structure is divided into 2 time coat 1 heat and 1 time coat and 2 time heat.
Color coated steel plate accroding to base plate:
The color coated steel plates classified by substrate are as follows: Color-coated steel plate, cold-rolled substrate color-coated steel plate, hot-dip galvanized color-coated steel plate, hot-dip galvanized color-coated steel plate, plated 5% aluminum-zinc color-coated steel plate, plated 55% aluminum-zinc color-coated steel plate, Electro-galvanized color coated steel plate, printed color plate, metal embossed color plate.
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Cold-rolled substrate color coated steel plate
The color plate produced from the cold-rolled substrate has a smooth and beautiful appearance, and has the processing performance of the cold-rolled plate; however, any fine scratches of the surface coating will expose the cold-rolled substrate to the air, so that the exposed iron is exposed. Red rust occurs fast, so this type of product can only be used for less demanding temporary insulation measures and for indoor use.
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Hot-dip galvanized color coated steel sheet
The product obtained by coating the organic paint on the hot dip galvanized steel sheet is a hot-dip galvanized coated sheet. In addition to the zinc protection, the organic coating on the surface of the hot-dip galvanized coated sheet also functions as an isolation protection against rust, and has a longer service life than the hot galvanized sheet. The zinc content of the hot-dip galvanized substrate is generally 180 g/m 2 (double-sided), and the galvanizing amount of the hot-dip galvanized substrate for construction use is 275 g/m 2 at the maximum.
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Hot-dip galvanized color coated steel sheet
The product obtained by coating the organic paint on the hot dip galvanized steel sheet is a hot-dip galvanized coated sheet. In addition to the zinc protection, the organic coating on the surface of the hot-dip galvanized coated sheet also functions as an isolation protection against rust, and has a longer service life than the hot galvanized sheet. The zinc content of the hot-dip galvanized substrate is generally 180 g/m 2 (double-sided), and the galvanizing amount of the hot-dip galvanized substrate for construction use is 275 g/m 2 at the maximum.
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Hot-dip galvanized steel
Hot-dip galvanized steel for color coated substrates are mainly two kinds: 55% AI-Zn and 5% AI-An
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Electro-galvanized steel plate
The electroplated zinc plate is used as the substrate, and the product obtained by baking the organic coating is an electrogalvanized steel coated plate. Since the zinc layer of the electrogalvanized plate is thin, the zinc content is usually 20/20g/m2, so the product is not suitable for use. Make walls, roofs, etc. outdoors. However, due to its beautiful appearance and excellent processing performance, it can be used mainly for home appliances, audio equipment, steel furniture, and interior decoration equipment.
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