Color coated galvanized coil
The choice of color coated galvanized coil mainly refers to the selection of mechanical properties, substrate type (type of coating) and coating weight, front coating performance, and back coating performance. Use, environmental corrosion, service life, durability, processing method, and degree of deformation are important factors that should be considered when selecting materials.
Choice of color coated galvanized coil
Selection of mechanical properties, substrate type, and coating weight. Mechanical properties are mainly selected based on factors such as application, processing method, and degree of deformation. For example, the roof panel of a building is usually not load-bearing, and the deformation is not complicated during processing, so TDC51D is usually selected. For parts with a relatively large degree of deformation, materials with good formability such as TDC52D and TDC53D should be selected. For components with heavy requirements, appropriate structural steel should be selected according to the design requirements, such as TS280GD, TS350GD, etc. The commonly used processing methods of color coated galvanized coil include shearing, bending, rolling, etc., which should be selected according to the characteristics of each processing method when ordering. In addition, since the mechanical properties of the substrate are usually used to replace the mechanical properties of the color coated galvanized coil in actual production, and the color coating process may lead to changes in the mechanical properties of the substrate, attention should be paid to this. Substrate type (type of coating) and coating weight are mainly selected based on factors such as application, environmental corrosion, service life, and durability. Anti-corrosion is one of the main functions of color coated galvanized coil. The type of coating and the weight of coating are the main factors that affect the corrosion resistance of color coated galvanized coil. Since the color coated galvanized coil for construction is usually directly exposed to the atmospheric environment, the substrates such as hot-dip galvanized sheets and hot-dip galvanized sheets with good corrosion resistance and thick coating are usually selected. In addition, the corrosion resistance of different types of coatings is also different. For example, in the case of the same coating thickness, the corrosion resistance of hot-dip Al-Zn coating is higher than that of hot-dip galvanized coating. In addition, the corrosion resistance generally increases with the increase of the coating weight, so the corrosion resistance of the color coated galvanized coil can be improved by using a substrate with high corrosion resistance or by increasing the coating weight. It should also be noted that there are differences in the corrosion resistance of the trimmed edges of the steel plates with different coating types. In addition, service life and durability are also important factors that cannot be ignored when selecting materials. If long service life and high durability are required, substrates with good corrosion resistance or heavy coating weight should be selected. Since the coating of aluminized zinc materials contains about 55% aluminum (Al), aluminum is an amphoteric metal that reacts with both acids and bases. After cement and water are mixed into concrete sand, it is highly alkaline. In such an alkaline environment, aluminum (Al) will undergo a chemical reaction, which will eventually lead to the dissolution of the coating and the loss of anti-corrosion protection. Therefore, the color coated galvanized coil including the aluminum-zinc-coated substrate is not suitable for use in direct contact with wet cement. The above is the choice of color coated galvanized coil.
Other properties of color coated galvanized coil
In some cases, color coated galvanized coil may need to have better organic solvent resistance, acid and alkali resistance, pollution resistance, and other properties, and attention should also be paid to such special properties. The selection of the performance of the reverse coating is usually determined by the manufacturer according to the application and the use environment. When the corrosive environment is not high, the reverse side of the color coated galvanized coil is usually only coated with one layer, which is mainly used for decoration. If the heat insulation material is pasted on the reverse side, it should be indicated when ordering, so that the manufacturer can coat the reverse side with paint with good adhesion properties. When the environment is highly corrosive, it should be coated with two layers to improve corrosion resistance. JIANGSU TISCO INDUSTRIAL CO., LTD can customize color coated galvanized coil according to customer’s requirements. TISCO is a steel manufacturer with 14 years of experience in the import and export trade. Welcome to inquire and buy.
Post time: Oct-24-2022