How to choose color coated board 1. Selection of color- […]
How to choose color coated board
1. Selection of color-coated substrate type and coating weight of color-coated plate: It is mainly selected according to the use, corrosiveness of the use environment, service life, durability and other factors. Anti-corrosion is one of the main functions of color-coated panels. The type of substrate and the weight of plating are the main factors that affect corrosion resistance. The color-coated panels for construction are usually made of hot-dip galvanized and hot-dip aluminum-zinc alloy substrates, and should be used in corrosive environments. A substrate with a good corrosion resistance and a large plating weight, and a difference in the corrosion resistance of the substrate notch when selecting a color-coated substrate.
2, color coated sheet mechanical properties Material selection: mainly based on use, processing methods, degree of deformation and other factors to choose. The strength requirements are not high, and the TDC51D and TDC52D series can be used when the deformation is not complicated. TDC53D, TDC54D are selected when the forming performance requirements are high, structural steels with load-bearing requirements are selected, and TS280GD, TS350GD, TS550GD are selected. The common deformation modes of color-coated panels are shearing, bending, and rolling. The mechanical properties may change with the color-coating process and storage time, and can easily cause creases during processing. Attention should be paid to this. The overall basis of Shandong Cai Tuban's material selection: mainly refers to the mechanical properties, substrate type, coating weight, front coating performance, reverse coating performance selection, use, use of environmental corrosion, service life, durability, processing methods, The degree of deformation is an important factor to consider when selecting coloring materials. , front coating selection) primer) topcoat) coating color difference) coating thickness
Shandong Caigang Released
Different primers have different adhesion, toughness and corrosion resistance. Epoxy has good adhesion to the substrate, high corrosion resistance, but is not as tough as other primers. The combination of polyester and the substrate is good and the toughness is excellent, but the corrosion resistance is not as good as the epoxy. Polyurethane is a good primer for overall performance. The primer is usually selected by the supplier according to the production process, use, corrosivity of the use environment, and the matching relationship with the topcoat.
Different types of finishes vary in hardness, flexibility, adhesion, durability, and so on. Polyester is currently the most used paint, durability, hardness, toughness, and moderate price. Silicon-modified polyesters have high durability, gloss, and color retention, but their toughness is slightly lower, and the high-temperature-resistance polyesters are more cost-effective. Polyvinylidene fluoride has excellent durability and good toughness, but it has low hardness and can provide less color and high price. The topcoat of color-coating is mainly influenced by its use, corrosiveness, service life, durability, processing method, and degree of deformation.
Color coating will have color differences in production use. Because the color difference is affected by various factors such as the production organization, color depth, use time, use environment, and use, it is usually negotiated by both parties when ordering.
Corrosion resistance generally increases with increasing coating thickness. When ordering, the coating thickness should be determined based on the corrosivity, service life, and durability of the use environment.