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What are the factors related to the service life of color coated coils

Update:20 Mar 2020
Summary:

Reasonable selection of materials can not only meet the […]

Reasonable selection of materials can not only meet the requirements of use, but also minimize costs. If the material is not selected properly, the result may be that the material performance exceeds the requirements for use, causing unnecessary waste, or it may fail to meet the requirements for use, causing degradation or unusability. Therefore, the buyer should attach great importance to the importance of reasonable selection of materials, and should consult relevant experts when necessary. The choice of color-coated board mainly refers to the selection of mechanical properties, substrate type and coating weight, front coating performance and back coating performance. Use, corrosiveness of the use environment, service life, durability, processing method and degree of deformation are important factors to consider when selecting materials. In actual production, the mechanical properties of the substrate are usually replaced by the mechanical properties of the substrate, and the color coating process may cause the mechanical properties of the substrate to change. In addition, mechanical properties may change with increasing storage time. These will increase the possibility of Ruedesian bands or creases during the processing of the color-coated sheet, which should be paid attention to.
Because of the different uses and environmental conditions of color coated coils, there are many factors affecting its service life. According to the use function, the service life of color coated coils can be divided into the following types:
1) The service life of coating refurbishment refers to the use time of the North China color coated coil surface with most of the defects such as delamination and rust spots, which cause further corrosion of the substrate.
2) Extreme service life refers to the time during which North China color coated coils can be used for a long time without refurbishment until severe corrosion occurs and they can no longer be used.
3) The decorative service life refers to the defects of subjective fading, chalking, cracking, and partial peeling of the coating on the surface of North China color coated coils. It has affected the image and aesthetics of the building, but it has not yet reached the extent that the coating has lost its protective effect.
From the perspective of the types of color plates commonly used in China and the normal use environment, the service life of architectural North China color coated coils can be generally: decorative life: 8-12 years; repair life: 12-20 years; extreme service life : More than 20 years; mechanical properties are mainly selected based on factors such as use, processing method and degree of deformation. When the strength requirements are not high and the deformation is not complicated, TDC51D and TDC52D series color coated boards can be used. When there are higher requirements on formability, TDC53D and TDC54D series color coated plates should be selected. For components with load bearing requirements, appropriate structural steel should be selected according to the design requirements, such as TS280GD, TS350GD series color coated plates. Shearing, bending, rolling, etc. are common processing methods for color-coated boards, and they should be selected according to the characteristics of each processing method when ordering.