Hot Dipped Galvanized Steel Coil

Hot Dipped Galvanized Steel Coil

Hot dipped galvanized steel coil is coated with a layerof zinc to prevent corrosion and prolong service life. Amongmany protective measures for matrix steel, hot-dip galvanizing is veryeffective. When zinc is in the liquid state, it is coated onto the surface ofmatrix steel by complicated physical and chemical effects. At the same time,zinc iron alloy coating is also formed. This methodis very suitable for highly corrosive environment of strong acid, alkali mist becausematrix steel will have strong corrosion resistance.

The principle of this method is as follows. In the first step,iron base is melted by zinc liquid and zinc - ironalloy phase layer is formed. In the second step, zinc ions in the alloy layerdiffuse toward the base and form zinc iron miscible layer. After that, alloylayer is enveloped by zinc layer. 

With beautifulappearance and corrosion resistance, hot dipped galvanized steel coil is widelyused in many fields, such as industry, agriculture, construction andtransportation. To be more specific, it can be extensively used in chemicalequipment, oil processing, ocean exploration, metal structure, powertransmission, shipbuilding, sprinkler irrigation, warm room, water and gastransmission, wire sets tube, scaffolding, housing and bridge, etc.

Detailed Specifications
Wallthickness: 0.15-3.0mm
Width: 400-1500mm
Weight of Zinc-coating (g/m2): 60-305
Standard: GB/T2518, ASTM A653, JISG3302, EN10327     
Material: SGCC (DX51D) /SGCD (DX52D) /SGCE (DX53D)/SGCF (DX54D)/
S220GD Z/S250GD Z/S280GD Z/G320GD Z/S350GD Z/S500GD Z/G550GC Z

There are many outstanding features of hot dipped galvanized steel coil. In thefirst place, it has a thick layer of pure zinc, so contactbetween matrix steel and corrosive solutions is avoided, thus protecting it. Inthe second place, it has a dense iron - zinc alloy layer, so it has unique corrosion resistance in sea salt atmosphere and industrial atmosphere.Thirdly, this product has strong wear resistancebecause it has a combination of solid zinc - iron miscible. In addition to that, hot dippedgalvanized steel coil can be processed by many processingwithout damage, including cold punching, rolling, drawing, bending because of good ductilityof zinc and solid adhesion between alloy layer and matrix steel. Hot-dip galvanizing, equal to annealing,can effectively improve the mechanical properties of matrix steel,eliminate stress of moldwelding and facilitate lathe work. Lastly, pure zinc layer hasductility and flexibility.