Galvanized coil

Galvanized sheets can be categorized into several types based on their production and processing methods:

① Hot-dip galvanized steel plate. A thin steel plate is dipped into a molten zinc bath, causing a thin layer of zinc to adhere to its surface. Currently, the main production method is the continuous galvanizing process, which involves continuously dipping rolled steel plates into a zinc-coated bath to produce galvanized steel plates.

② Alloyed galvanized steel sheet. This steel sheet is also manufactured by the hot-dip process, but it is immediately heated to around 500℃ after being dipped, to form an alloy film of zinc and iron. This galvanized sheet offers good adhesion to paint and welding properties.

③ Electro galvanized steel sheet. This type of galvanized steel sheet, produced by electroplating, offers good workability. However, the coating is thinner and less corrosion-resistant than hot-dipped 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 type of electro-galvanized sheet with a thin zinc coating on the other side, known as double-sided differential electro-galvanized steel sheets.

⑤ Alloy and composite galvanized steel plate. It is made by alloying zinc with other metals such as aluminum, lead, and zinc, even to the point of being composite galvanized. This steel plate boasts 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-dip galvanized steel.