| Message: | Products DescriptionGalvanized roofing sheet is a steel plate with a layer of zinc on the surface. Galvanized roofing sheet is commonly used economical and effective anti rust surface treatment. and it is used to prevent corrosion of metal sheet from prolonging its service life.There are mainly five kinds of metal plate:1. Alloying galvanized steel sheet2. Electro galvanized steel sheet (EGS)3. One side galvanization and double side differential galvanized steel plate4. Alloy and composite galvanized steel sheet5. Galvanized roofing sheetHere we mainly introduce galvanized roofing sheetThe cold roof is immersed in the molten zinc pot to make the surface covered with zinc. The main technology is continuous galvanizing process which is sending roofing coil into the zinc bath. During the production,Website:http://www.galvanized-steel.com, one important
process is finishing.The finishing of GI roof can be achieved as follows:(1) To improve the flatness and smoothness of the galvanized roofing sheet, and also to smooth the surface of the zinc particles to make the strip smooth, which
is particularly favorable for the future deep drawing and other applications with high precision.(2) After finishing, the surface of the galvanized roofing sheet has certain roughness. It can improve the adhesion force of the zinc coating, and store a certain amount of oil, which is beneficial to the lubrication
of the stamping die when deep drawing.(3) For the prepaint, the small zinc flower can still be visible through the paint layer though
the surface is controlled by small zinc spangle. Therefore, for some galvanized plates with high demand, the surface of small zinc spangle should be treated by finishing. This will make the galvanized metal sheet get a more uniform silver appearance.(4) The lower yield point can be reduced and the yield platform can be disappearing or not too obvious. The slip line can be prevented in the subsequent
drawing or deep drawing process, and the possibility of......url:http://www.galvanized-steel.com |
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