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Category Cars
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Created 2019-05-12
Owner juniperqq
Title Precautions for Choosing A Color Coated Sheet
Description In order to further improve the corrosion resistance of China Galvanized Steel Roofing Sheet for sale, the surface zinc layer is not directly in contact with the air, and the surface coloring property is increased, and painting is required. That is to say, depending on the application, it is necessary to select a suitable substrate and coating, and adopt appropriate painting methods to produce a color-coated roofing sheet that meets the requirements. In order to have good adhesion to the surface of the coating and the galvanized sheet, the galvanized surface needs to be chemically treated. First, clean the oil and dirt attached to the surface of the galvanized sheet, otherwise, it will affect the adhesion of the coating, so it needs to be decreased and cleaned. The chemical conversion treatment is then carried out, usually by forming a layer of composite oxide on the galvanized surface or by phosphate treatment. The former has good paint film adhesion, while the latter has good corrosion resistance. After the chemical conversion treatment, it is sufficiently dried to be painted without moisture. Under normal circumstances, low cost color-coated corrugated roofing sheet generally has two aspects to pay attention to. 1. Selection of substrate (substrate strength, galvanizing amount and surface finishing, etc.) 2. The choice of paint. How to choose color-coated plates is an important problem in use, resulting in waste, that is, material properties cannot meet the requirements of use. Hot-dip steel plates have many uses in construction.
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