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Prepainted Galvanised Steel Coil/PPGI/Corrugated Roofing Sheets Coil factory with low price steel coil.

Galvanized steel is to prevent the steel plate surface from corrosion to extend its service life. Coated with a layer of metal zinc, the zinc coated steel plate is called galvanized sheet.

According to the production and processing methods, it can be divided into:

• Hot dip galvanized steel: Thin plate in melting zinc bath, making its surface adhere to a layer of zinc sheet. Currently, the continuous galvanizing process is mainly adopted, namely the continuous roll of steel plate in the melt zinc plating tank.
• Alloying of galvanized steel: Made by hot dip method, but after slotting, immediately heated to a temperature of about 500℃ to generate a zinc and iron alloy membrane. This kind of galvanized sheet offers excellent coating adhesion and weldability.