1.Type
Color-coated steel plates are classified according to the substrate, including cold-rolled substrate, hot-dip galvanized substrate and electro-galvanized substrate. According to the surface condition, there are coated plate, embossed plate and printed plate.
2.Construction
The coating structure of the color-coated steel plate includes five layers: top coating, chemical coating film, bottom coating, zinc layer, and cold-rolled steel plate.
3.Production process
Color-coated steel plate is a composite material in which the metal substrate passes through a color roller coating unit, undergoes surface degreasing and phosphating chromate treatment, and is coated with one or more layers of organic coatings on the surface and baked and solidified. The product is refined on a high-speed continuous unit through chemical pretreatment, primary coating, fine coating and other processes.
4.Features
Compared with other building plates, color-coated steel plates have excellent decorative properties, formability, and corrosion resistance. The coating has strong adhesion and can maintain a novel color for a long time. It is an ideal substitute for building plates.
2. Comparison of features
Compared with traditional steel plates, color-coated steel plates have certain advantages in terms of economy, construction speed and technical characteristics.
1. Economic comparison
Color-coated steel plates are steel plates based on hot-dip galvanizing. The price is generally in the range of 5,400-6,500 yuan/ton, while ordinary galvanized sheets are 4,880-6,000 yuan/ton. The price is higher than that of traditional steel plates. It's not big, but its working performance is much better than that of traditional steel plates. For example, it adds decorative properties and long-lasting color. In addition, the process problems of steel plate coating are solved, and embossing, printing and different types of colors and surface structures are added to the surfaces of different products. Therefore, the performance-price ratio of color-coated steel plates has obvious advantages.
Taking color plate doors and windows as an example, color windows use 10-12 kilograms of steel per square meter, while old-fashioned solid web steel windows require 22-25 kilograms per square meter. According to statistics, using color plate doors and windows, the steel consumption per square meter The material cost is saved by 30-40 yuan, and the maintenance fee is saved by 2 yuan per square meter. If calculated based on the national annual construction volume of 100 million square meters, it will save more than 700,000 tons of steel every year, reduce production costs by more than 3 billion yuan, and save users 200 million yuan in maintenance fees. The application of color plates in the building doors and windows industry will have a certain future.
2. Construction speed
Compared with traditional steel plates, color-coated steel plates have the advantages of easy installation, fast construction (no wet work), strong and reliable connections, unlimited construction seasons, and no need for secondary decoration. In order for traditional steel plates to achieve the same decorative effect as color-coated steel plates, the steel plates need to be painted. Therefore, the construction speed of color-coated boards is fast.
3.Technical characteristics
Color-coated steel plates not only have the inherent technical characteristics of traditional steel plates. There are also the following features:
1. The color plate is continuously heated in an oven at 1200°C for 100 hours. The coating surface will be glossy without any change in surface color.
2. There is no peeling off of the surface coating after bending or stamping, and the coating quality is far more uniform, stable and ideal than that of single-body spraying or brushing on the surface of formed metal.
3. It can maintain its luster and rust for more than 30 years indoors.
