Caitu in use environment is not the same, in use require a screw in a supporting role, can improve the life of color-coated, following the Xiaobian to introduce how to screw in the color-coated applications It plays an important role because of the ocean-atmosphere containing salt state crown color coated paper, with strong corrosion. Steel from the coast nearer the more severe corrosion, the corrosion rate is many times higher than inland atmosphere. Steel contact with the timber, the timber due to moisture after the secretion of acid, causes severe corrosion of metal. Practice has proved that to reach more than 30 years of age, you must use AISI304 or 316 stainless steel screws picture painted coil, which is Europe's first choice for steel construction fasteners. Can prevent the occurrence of corrosion fundamentally. Watertight gasket and screws have a great relationship quality, the introduction of Switzerland SFS fastener system with a EPDM waterproof gasket, unique performance, temperature -50 ℃ ~ + 100 ℃, resistance to ozone and ultraviolet light, can effectively resist outdoor weathering, the volume of the gasket has a sufficient elasticity, can adapt to the displacement of the screw and the installation error. "EPDM" waterproof gasket optimized design, the screws are in place, the top of the screw can close the inner gasket to prevent moisture intrusion. SFS stainless steel screw fastening systems and supporting washer fully applicable to the open structure of the roof, the roof drilling and fastening on purlins. If the structure painted with hidden volumes, although not exposed screws, in order to resist the water film and "acid rain" erosion of house member, must also be made of stainless steel screws. Therefore, we must not be careless in choosing color coated fine without error. In this paper, the actual production on the thick edge coating color coating production prone to thickening analyzed Binzhou color coated paper, and in many ways made the appropriate preventive measures. 1. The edge thickness phenomenon ???? in caitu production process, there strip edge portion (typically less than 1mm wide) coating thickness is slightly higher than the other portions of the phenomenon and accompanied by fine bubbles, typically called edge thickening. Theoretically, the production process in the color-coated edge thickening phenomenon is inevitable. Typically since the coating is thin (monolayer thickness not exceeding 18 ?? m), edge thickness is not obvious, it will not affect the use of the product. Color coated paper manufacturer, Jinhong Run steel (certified), Jiayuguan color coated paper provided by the Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry. Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) is a leader in Binzhou, board (with) wood, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Jinhong Run Steel leadership with the staff warmly welcome all inquiries negotiations to create a better future for the steel Jinhong Run. You can also access (www.bxjhr.com/supply_details_45150900.html), for more information about the company.