Corrosion resistant corrugated galvanized roofing board: galvanized steel plate made in China, provide steel price GB zinc 15 pieces

Introduction to galvanized sheet

Galvanized sheet is a steel plate with a layer of zinc plated on the surface. Galvanizing is a cost-effective method of rust prevention, and about half of the world's zinc production is in this process. The main purpose of galvanized steel plate is to prevent the surface of the steel plate from being corroded, thereby extending its service life. The surface of the steel plate is coated with a layer of metallic zinc, which is called galvanized layer or galvanized film. According to different application needs, the packaging form of galvanized sheet can be divided into two kinds of shear growth galvanized sheet and coil galvanized sheet. Generally, it is packed with iron, lined with moisture-proof paper, and fixed and bound on the bracket with iron kidney to ensure that the internal galvanized sheet will not be damaged by friction.

Hot dip galvanizing and electric galvanizing

Hot-dip galvanized steel plate: the steel plate is immersed in a molten zinc bath, so that its surface is attached to a zinc layer. At present, it is mainly produced by continuous galvanizing process, which means that the rolled steel plate is continuously immersed in zinc bath to make galvanized steel plate. The galvanized steel plate produced by this method has good corrosion resistance and long service life.

Electrogalvanized steel plate: The galvanized steel plate prepared by electroplating method has good processing properties, but its coating is thinner and its corrosion resistance is not as good as that of hot galvanized plate. Electrogalvanizing is suitable for products requiring fine processing, such as home appliance housings.

Surface condition

Due to the different treatment methods in the coating, the surface condition of galvanized plate is also different, common zinc flowers, fine zinc flowers, flat zinc flowers, zinc flowers, no zinc flowers, phosphating surface and other processes. The German standard also stipulates the surface level, which requires that the galvanized sheet should have a good appearance and should not have defects harmful to the use of the product, such as no coating, holes, cracks, scum, excessive coating thickness, scratches, chromic acid stains, white rust and so on.

Alloyed galvanized steel sheet

Alloyed galvanized steel is also made by hot dipping, but it is heated to about 500 ° C immediately after being removed from the tank to form a zinc-iron alloy film. This galvanized sheet has good adhesion and weldability of the paint; Alloy, composite galvanized steel is made of zinc and other metals such as aluminum, lead and so on. This steel plate not only has excellent anti-rust properties, but also has good coating properties.

Performance index

Generally speaking, only galvanized sheets used for structural, drawing and drawing purposes have tensile properties. Among them, the galvanized sheet used for structure requires yield point, tensile strength and elongation. Only elongation requires a tensile test. For specific values, see the relevant product standards in section 8. The test method is the same as the test method for general steel plates, see the relevant standards specified in "8" and the test method standards listed in "ordinary carbon steel sheet".

Application field

Galvanized steel products are widely used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. Specific applications are as follows:

Construction: Mainly used in the manufacture of corrosion-resistant roofing panels and roofing grates for industrial and civil buildings.

Light industry: used to manufacture home appliance shell, civil chimney, kitchenware, etc.

Automotive industry: mainly used in the manufacture of corrosion-resistant parts of automobiles.

Agriculture, animal husbandry and fishery: for the storage and transportation of meat and aquatic products such as grain storage and transportation, frozen processing equipment.

Commercial: mainly used for material storage and transportation, packaging equipment and so on.

It can be seen from the above introduction that galvanized steel plate has become one of the indispensable materials in many industries because of its excellent corrosion resistance and a wide range of application fields.