DX52D 53D DDQ Galvanized Steel SPCC Z90 Home Appliance Board Zero Spangle Skin Pass Cr3+ Chromated Free Unoiled GI Sheet

DX52D 53D DDQ Galvanized Steel SPCC Z90 Home Appliance Board Zero Spangle Skin Pass Cr3+ Chromated Free Unoiled GI sheet

Hot-dip galvanised steel coil (GI) is made by passing a fully hardened steel sheet, which has undergone a pickling and rolling process, through a zinc pot, thereby coating the surface with a zinc film. Due to the properties of zinc, it offers excellent corrosion resistance, paintability and workability. Typically, the process and specifications for hot-dip galvanised steel sheet and galvanised steel coil are essentially the same.

Characteristics and Benefits of Galvanized Steel

Galvanized steel is mild steel coated with a layer of zinc. The zinc coating offers cathodic protection to the underlying steel, meaning that if the surface is damaged, the zinc will corrode before the steel does, thereby protecting it from corrosion. Galvanized steel is extensively used in the building sector, automotive industry, agriculture, and other areas where steel needs protection from corrosion.

Hot-Dip Galvanizing Process (HDG)

Hot-Dip Galvanizing (HDG) is a process where zinc bonds to steel at the molecular level to produce a four-layer corrosion-resistant finish. The first three layers consist of zinc-iron alloy layers that are actually harder than the base steel. The fourth, or top layer, is pure zinc. This multi-layered structure ensures long-lasting durability and protection against corrosion.

1) Standard: JIS G3302 1998, ASTM A653M/A924M 2004, all according to the customer's request
2) Grade: SGCC, SGCH,DX51D, Q195,Q235 all according to the customer's request

3) Capacity: about 12000 tons per month

4) Thickness: from 0.13mm to 2mm, all available
5) Width: from 600mm to 1250mm, regular size:750-762mm,900-914mm,1000mm,1200mm,1219-1250mm all available
6) Coil ID: 508mm
7) Coil weight: from 2-10MT, according to the customer's request

8) Zinc coating weight: 40g/m2-275g/m2

9) Spangle: regular spangle,big spangle, small spangle and zero spangle
10) Surface treatment: Chemical passivating, oils, passivating oils,skin passed
11) Edge: mill edge, cut edge
12) Min trial order 25 ton each thickness

Main characteristics of galvanised steel

• Corrosion protection: 13 years for heavy industrial areas, 50 years for marine, 104 years for suburban areas and 30 years for urban areas.

• Inexpensive: Hot dip galvanising costs less than other coatings.

• Reliable: The zinc coating is metallurgically bonded to the steel and forms part of the steel surface, making the coating more durable.

• Toughness: the galvanised steel layer forms a special metallurgical structure that can withstand mechanical damage during transport and use.

• Comprehensive protection: every part of the coating can be galvanised and is fully protected even in depressions, sharp corners and hidden areas.

• Saving time and effort: the galvanising process is faster than other coating methods

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