How to choose color coated board

1. Selection of color-coated board substrate type and color-coated board coating weight: The selection is mainly based on the purpose, corrosion of the application environment, service life, performance and other factors. Anti-corrosion is one of the four important functions of color-coated boards. The type of substrate and coating weight are important factors affecting corrosion resistance. For engineering color-coated boards, hot-dip galvanized substrates and hot-dip aluminum-zinc aluminum alloy substrates are generally selected. In natural environment, substrates with good corrosion resistance and heavy coating should be used. On the other hand, when selecting color-coated substrates, special attention should be paid to the difference in corrosion resistance of the substrate wound.
2. Material selection for color-coated board physical properties: The key is to select based on factors such as usage, processing methods, and deformation degree. When the strength requirements are not high and the deformation is not complicated, color-coated boards of the TDC51D and TDC52D series can be used. When the forming performance requirements are high, choose TDC53D and TDC54D. For prefabricated components with load requirements, choose the appropriate structural steel, TS280GD, TS350GD, and TS550GD. The commonly used deformation methods of color-coated boards are cutting, bending, and rolling. The physical properties may vary greatly with the color-coating processing technology and storage time, and may easily cause wrinkles during production and processing, so special attention should be paid to this. , The overall basis for color-coated board material selection: mainly refers to physical properties, substrate type, coating weight, back coating properties, selection of back coating properties, purpose, application of environmental corrosion, service life, performance, and processing methods , The deformation level is a key factor to be considered when selecting materials for color-coated boards. , Reverse coating selection) Topcoat) Paint) Coating color cast) Coating thickness
3. There are certain differences in the adhesion, toughness and corrosion resistance of different topcoats. Epoxy resin has excellent total iron bonding strength with the substrate and has high corrosion resistance, but its ductility is not as good as other topcoats. Polyester has good bonding strength with the substrate and excellent ductility, but its corrosion resistance is not as good as that of epoxy resin. Polyurethane material is a comprehensive topcoat with good performance. The topcoat is generally selected by the supplier based on the production process, purpose, application of environmental corrosion, and matching relationship with the paint.
4. Different paint types have differences in strength, flexibility, adhesion, performance, etc. Polyester is a coating that is in high demand at present. It has general performance, good strength and ductility, and is reasonably priced. Silicone-modified material polyester has high performance, gloss, and color retention, but its ductility is slightly reduced. High aging resistance polyester is more cost-effective. Polyvinylidene fluoride has excellent performance and good ductility, but has low strength, may have less color, and is expensive. The paint of color-coated boards is mainly based on the purpose, environmental corrosion, service life, performance, processing method, and deformation hazard.
5. When used in manufacturing, color-coated boards may have a color cast. Because the color cast is affected by many factors such as the manufacturing mechanism, color shade, use time, use environment, purpose, etc., it is usually negotiated by the supplier and the buyer when ordering.
6. Corrosion resistance generally increases as the coating thickness increases. When ordering, the coating thickness must be determined based on the corrosion, service life, performance and other factors of the application environment.