The quality of the color-coated galvanized sheet has an important relationship with the selection of its basic materials, the production process and the production method. Especially in the production, some details should be paid attention to, otherwise it will affect the quality of the product.
The bluntness causes the color-coated board to age, and the defects of scratches and paint peeling occur during pressing. The primer and passivation layer are not well combined due to the problem of coating resin raw materials. until both ends of the steel plate are fixed. A simple and effective method is to use a pair of jaw pliers to clamp the overlapped steel plates respectively. Dust will affect the surface quality of the finished color-coated galvanized sheet, and in particular, it may cause quality defects in the aging-exploded paint of the color-coated galvanized sheet. The color-coated boards of different types should be placed on devices such as rubber pads, skids, brackets, etc., and the strap locks should be facing upwards, and should not be placed directly on the ground or transportation tools.
After removing the anti-rust oil, rust spots, dust, etc. attached to the surface of the color-coated galvanized sheet, chemical coating is performed on the clean production surface of the substrate to form a reticulated chemical conversion film, thereby increasing the gap between the substrate and the coating. improve the adhesion of the substrate, improve the corrosion resistance of the substrate and the durability of the coating. The product that coats the organic coating on the hot-dip galvanized steel sheet is the hot-dip galvanized color-coated sheet. According to requirements, hot-dip galvanized steel sheets can also be used as color-coated substrates.
