Classification of color coated steel sheet

The quality of color coated steel plate depends on the quality of the coated substrate used in production and the thickness and process of the coating. The types of substrates can be divided into the following:

1. Cold rolled steel sheet

After degreasing, cleaning and chemical conversion, the cold rolled substrate is directly used as the color coated substrate, and then coated with paint for baking. However, if there are small scratches on the surface coating, the cold rolled substrate will be exposed to the air and rust quickly. Weak corrosion resistance. At present, this kind of color coated steel plate is basically not produced. Such products can only be used for temporary isolation measures with low requirements and indoor materials.

2. Electro galvanized steel sheet

The utility model takes the cold-rolled, electroplated and treated as the color coated substrate, and then coated with paint and baked at high temperature. The advantage is that this kind of color coated plate has low hardness and is easy to form. It is generally used in the field of steel windows of household appliances and is suitable for indoor use.

3. Hot dip galvanized steel sheet

The product obtained by coating the coating on the hot-dip galvanized steel plate is the hot-dip galvanized color coated plate. In addition to the protection of zinc, the organic coating on the surface also plays the role of isolation protection and rust prevention, and has a long service life. Is the most used product. It is mainly used in outdoor steel structure construction, mechanical packaging, household appliances and many other fields. PPGI (Pre-Painted Galvanized steel coil) Z50g / ㎡, Z80 g / ㎡, Z100 g / ㎡, z120 g / ㎡, z140 g / ㎡, z180 g / ㎡, z200 g / ㎡, z220 g / ㎡, z275 g / ㎡ are the most heavy coatings. Production can be selected according to customer needs.

4. Aluminum zinc steel sheet

The anti-corrosion and anti-oxidation capacity of alloy steel wrapped with aluminum zinc alloy is twice that of previous hot-dip galvanizing. The zinc layer weighs more: az30 g / ㎡, az50 g / ㎡, AZ70 g / ㎡, AZ80 g / ㎡, az100 g / ㎡, az120 g / ㎡, az150 g / ㎡, etc. Up to 220 g / m2, which can be produced according to customer needs.