Galvanized sheet refers to the appearance of the steel sheet coated with a layer of zinc. Plating is an economical and effective method for preserving an often accepted. About half of the global zinc production are used in this process.
1. Definition of galvanized steel galvanized sheet steel plate appearance suffered corruption, extending its life called galvanized sheet coated with a layer of zinc metal, the type of zinc-coated steel sheet, steel plate appearance.
2. Classification and use of galvanized sheet production and processing methods can be divided into the following categories:
① hot-dip galvanized sheet. The thin steel sheet was immersed in the molten zinc tank, the thin steel sheet to its appearance, adhesion to a layer of zinc. Currently accepted continuous galvanizing process production,I.e. into a roll of the continuous steel plate was immersed in the melt with a zinc plating bath made from galvanized steel; ② alloyed galvanized steel. Such steel plate is manufactured using the hot-dip method, but after a slot, immediately heated to about 500 ℃, its the generated zinc and iron alloy coating. Kind of galvanized sheet having a good paint adhesion and weldability; ③ galvanized steel. Manufactured by plating such galvanized steel sheet having excellent workability. However, the coating is thin, corrosion-resistant hot dip galvanized sheet resistance is better;
④ sided plated and double-sided difference galvanized steel. The single-sided galvanized steel, i.e. only in the side of the galvanized product. Welding, painting, anti-rust treatment, processing,Has better adaptability than the two-sided galvanized sheet. For the surrender of one side not coated with zinc shortcomings, another one in another top coat with a thin layer of zinc galvanized sheet, galvanized sheet that is double-sided difference;
⑤ alloy composite galvanized steel sheet. It is of zinc and other metals such as lead, made of zinc alloy into a steel plate and even the composite plating. Such steel has both excellent rust resistance, and good coating performance. In addition to the above five color galvanized steel, printing coating galvanized steel, polyvinyl chloride laminate galvanized steel sheet and so on. However, currently the most frequently used remained hot-dip galvanized sheet. The present invention relates to the galvanized sheet surface treatment technology,Discloses a phosphate processing optical entire zinc flower hot galvanized plate surface phosphating solution at room temperature, using zinc phosphate processing optical spangle hot galvanized plate.
