Galvanized steel sheets are coated with a layer of metallic zinc to prevent corrosion of the steel surface and extend its service life. These zinc-coated thin steel sheets are known as galvanized sheets and can be categorized into the following types based on production and processing methods: ① Hot-Dip Galvanized Steel Sheets. These are thin steel sheets that are immersed in a molten zinc bath, resulting in a thin layer of zinc adhering to the surface. Currently, the continuous galvanizing process is mainly used for production, where rolled steel sheets are continuously immersed in a zinc-coated bath to form galvanized steel sheets; ② Alloy Galvanized Steel Sheets. These sheets are also manufactured using the hot-dip method, but after being dipped out, they are immediately heated to approximately 500°C to form an alloy of zinc and iron coating. These galvanized sheets have good adhesion and weldability with paints; ③ Electro-Galvanized Steel Sheets. These galvanized sheets are produced using the electroplating method, which offers good workability. However, the coating is thinner and has lower corrosion resistance compared to hot-dip galvanized sheets.
Categorized by surface treatment methods: Chrome-free passivation, oiling treatment, chrome-free passivation with oiling, and environmentally friendly passivation treatment.
By surface condition classification: flowered and unflowered
Galvanized Steel Sheet Grade: Cold Forming: DC51D
Structural steel: S300GD/S350GD/S550GD
For stamping: DX52D,
Deep drawing grade: DX53X
Extra Deep Drawing: DX54D~DX56D
Galvanized steel sheets are primarily used in construction, home appliances, automobiles, containers, transportation, and industrial applications. Particularly in steel structure buildings for floor decks, rafters, and the like.
High-tensile, zinc-rich coated angle iron material brands: Yehui, Shangxing Zongcheng, Handao, Guanzhou, etc., mainly used for steel structure factory roof purlins, C/Z-shaped steel, and roof deck panels.
Environmentally friendly zinc plated steel sheets with no oil or paint: brands include Ye Hui, Shougang, Anshan Iron & Steel, Ma Steel, Wuhan Iron & Steel, etc., mainly used in household appliances and electromechanical equipment.
High-tensile, high-zinc-coated purlin material
