GI CORRUGATED SHEET，zinc coated steel roofing

GI CORRUGATED SHEET，zinc coated steel roofing is a steel plate with a layer of zinc on its surface.GI CORRUGATED SHEET，zinc coated steel roofing is often used as an economical and effective rust prevention method. About half of the world's zinc production is used in this process.
GI CORRUGATED SHEET，zinc coated steel roofing is to prevent corrosion of the steel plate surface to extend its service life, coated with a layer of metal zinc on the surface of the steel plate, this GI CORRUGATED SHEET，zinc coated steel roofing is called galvanized sheet.
According to the production and processing methods, it can be divided into the following categories:
(1) hot dip GI CORRUGATED SHEET，zinc coated steel roofing.Dip the sheet steel into a molten zinc bath and make it adhere to a sheet of zinc.At present, the main use of continuous galvanized process production, that is, the roll of steel plate continuous immersion in the melting of zinc plating tank made of galvanized steel plate;
② alloyed GI CORRUGATED SHEET，zinc coated steel roofing.This kind of steel plate is also made by hot dip, but immediately after the trough, it is heated to about 500℃, so that it produces zinc and iron alloy film.The galvanized sheet has good coating density and weldability;
③ electric GI CORRUGATED SHEET，zinc coated steel roofing.The galvanized steel plate produced by electroplating method has good processability.But the coating is thin, corrosion resistance is not as good as hot dip galvanized sheet;
④ single-sided plating and double-sided GI CORRUGATED SHEET，zinc coated steel roofing.Single-sided galvanized steel, i.e. galvanized on only one side of the product.In welding, coating, anti-rust treatment, processing and other aspects, with better adaptability than double-sided galvanized sheet.
In order to overcome the shortcomings of not coated zinc on one side, there is a galvanized sheet coated with thin layer of zinc on the other side, that is, double-sided difference galvanized sheet;

⑤ alloy, composite GI CORRUGATED SHEET，zinc coated steel roofing.It is made of zinc and other metals such as aluminum, lead, zinc alloy and composite plating into the steel plate.This kind of steel plate has not only excellent rust resistance, but also good coating performance;