Color coated steel plate is a composite material, also known as color coated steel plate. It is a product made by continuously applying surface phosphating, degreasing, and other chemical transfer coating treatments on the production line using strip steel, followed by painting and coating, and baking. The coating types of color steel plates can be divided into: polyester (PE), silicon modified polyester (SMP), polyvinylidene fluoride (PVDF), high weather resistant polyester (HDP), and clinker sol. How to judge the quality of color coated rolls and teach you some tips for purchasing.
1. Observe the thickness of the substrate, the thickness of the coating, and the type of paint
Color steel plate is composed of a substrate, paint, and coating. When using, we need to consider the thickness of the substrate and the grams of zinc coating. The commonly used color steel plate substrate on the market has a thickness of 0.4-0.8mm, and the coating thickness is between 18-23 microns. From the perspective of affecting the service life of color steel plates, the thickness of the substrate is very important. However, the number of grams of zinc coating directly affects the corrosion resistance life of color steel plates.
Many manufacturers of low-quality color steel plates on the market often make changes to the substrate and color steel plate coating or paint, because customers are also difficult to detect. They reduce the thickness of the substrate to save costs, reduce the number of grams of zinc layer, and then reduce the film thickness of paint, which greatly reduces the service life of color steel plates.
2. Hearing, touch sound
Strike the color steel plate with your fingers or a hard object. If the material of the color steel plate is poor, the sound produced is muffled, and the metal sound is not obvious. The metal sound of the color steel plate with better material is relatively loud and crisp.
3. Observe the outer leakage edge of the color steel plate
Take a colored steel plate and first observe whether the exposed steel, such as the cross-section, is finely crystallized, whether it is gray, dark, or impurities. If the cut surface is crystalline and dense, it is of better quality.
5. Check the quality certificate of the color steel plate
Everything is worth a penny for a penny. When comparing the quality of color steel plates, price is one aspect, but don't pay too much attention to price. If the price of one type of color steel plate is much lower than others, then we need to pay attention. It may seem cheap to buy, but it will take three to five years to replace, which will result in even more losses.
4. Based on the price, is it a legitimate agency source
Are there any inspection standards from relevant departments. If possible, try to visit the manufacturer of color steel plates for on-site inspection. Look at the environment of the enterprise and see if it is formal. For example, Li Ying has been a top tier agent in the industry for 20 years, with a good reputation in the market, making it easy to buy and comfortable to use.