Composite galvanized steel plate

Galvanized sheets can be categorized into the following types based on production and processing methods:

① Hot-Dip Galvanized Steel Sheet. A thin steel sheet is immersed in a molten zinc bath to coat it with a thin layer of zinc. Currently, the main production method is the continuous galvanizing process, where rolls of steel sheets are continuously dipped into a zinc-coated bath to form galvanized steel sheets.

② Alloyed Galvanized Steel Sheet. This steel sheet is also manufactured by hot-dip process, but immediately after the tank, it is heated to about 500°C to form an alloy film of zinc and iron. The galvanized sheet offers good adhesion to paint and welding properties.

③ Electroplated galvanized steel sheet. This type of galvanized steel sheet, manufactured by electroplating, offers good workability. However, the coating is thinner and less corrosion-resistant than hot-dip galvanized steel sheets.

④ Single-sided and double-sided electro-galvanized steel sheets. Single-sided electro-galvanized steel sheets refer to products that are zinc-coated on only one side. They offer better adaptability in welding, painting, rust prevention, and processing compared to double-sided electro-galvanized sheets. To overcome the drawback of the uncoated side, there is also a zinc-coated sheet with a thin zinc layer applied to the other side, known as double-sided differential electro-galvanized steel sheet.

⑤ Alloyed and composite galvanized steel sheets. Made by alloying zinc with other metals such as aluminum, lead, and zinc, these sheets are further coated to form composite galvanized steel. They offer both rust-proof properties and excellent painting performance.

In addition to the aforementioned five types, there are also color-coated galvanized steel sheets, printed coated galvanized steel sheets, and polyvinyl chloride laminated galvanized steel sheets, etc. However, the commonly used type is still hot-dipped galvanized sheet.