The selection of the plate substrate type and the weigh […]
The selection of the plate substrate type and the weight of the plating plate of the color-coated plate is mainly selected according to factors such as the use, the corrosiveness of the use environment, the service life, and durability. Anti-corrosion is one of the main functions of color-coated plates. The type of substrate and the weight of the coating are the main factors affecting the corrosion resistance. The color-coated plates for construction usually use hot-dip galvanized substrates and hot-dip aluminum-zinc alloy substrates, which should be used in corrosive environments. A substrate with good corrosion resistance and a large coating weight. In addition, when selecting a color-coated substrate, attention should be paid to the difference in corrosion resistance of the substrate incision.
2, color coating plate mechanical properties selection: mainly based on the use, processing methods, degree of deformation and other factors to choose. The strength requirements are not high, and the TDC51D and TDC52D series of color-coated plates can be used when the deformation is not complicated. When the forming performance requirements are high, select TDC53D, TDC54D, and the components with load-bearing requirements, select the appropriate structural steel, TS280GD, TS350GD, TS550GD. The common deformation forms of color-coated plates are shearing, bending and rolling. The mechanical properties may change with the color coating process and storage time, which may cause creases during processing. The overall basis for the selection of Shandong color-coated plates: mainly refers to mechanical properties, substrate type, coating weight, front coating performance, selection of reverse coating properties, use, environmental corrosivity, service life, durability, processing methods, The degree of deformation is an important factor to consider when selecting a color coated board. , front coating selection) primer) top coat) coating color difference) coating thickness
Shandong color steel plate published
There are certain differences in adhesion, toughness and corrosion resistance of different primers. The epoxy has good adhesion to the substrate and high corrosion resistance, but the toughness is not as good as other primers. The polyester has good adhesion to the substrate and excellent toughness, but the corrosion resistance is not as good as epoxy. Polyurethane is a primer with good overall performance. The primer is usually selected by the supplier according to the production process, the application, the corrosive environment of the use, and the matching relationship with the topcoat.
Different types of topcoats differ in hardness, flexibility, adhesion, and durability. Polyester is the most widely used coating, with good durability, good hardness and toughness, and moderate price. The silicon-modified polyester has high durability, gloss and color retention, but the toughness is slightly lowered, and the high weather resistance polyester has a high cost performance. Polyvinylidene fluoride has excellent durability and good toughness, but has low hardness and is available in a small amount of color and a high price. The topcoat of the color coated board is mainly affected by the application, environmental corrosivity, service life, durability, processing method and degree of deformation.
Color-coated plates will have chromatic aberration in production and use. Because the color difference is affected by many factors such as the production organization, color depth, use time, use environment, use, etc., it is usually negotiated between the supplier and the buyer.
Corrosion resistance generally increases with the thickness of the coating. The thickness of the coating should be determined according to the corrosiveness, service life and durability of the environment.