HDG/Galvanized Steel Plate
Zinc is soluble in acid, can dissolve in alkali, so called gender metal. Zinc is almost no change in the dry air, In moist air, a carbonate film will be formed on the surface. Zinc coating will be corroded in sulfur dioxide, hydrogen sulfide and the marine atmosphere, especially in hot and humid atmosphere containing organic acids. Standard electrode potential of zinc is -0.76V, For steel the zinc coating is anodic coating, it's mainly used to prevent steel corrosion and protect performance based on the coating thickness. The passivation of zince coating, staining or coating of light protection agent, can significantly improve the protective and decorative.
1.Specification
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Grade
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Nominal thickness(mm)
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Nominalwidth(mm)
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Coil O.D.
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Weight
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Common galvanized(Z)
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0.18-2.5
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600-1250
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610or508
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coil≤10
|
|
Galvannealing(ZF)
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0.18-2.5
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600-1250
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610or508
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coil≤10
|
|
Zn-Al (ZA)
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0.18-2.5
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600-1250
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610or508
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coil≤10
|
|
Al-Zn alloy(AZ)
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0.18-2.5
|
600-1250
|
610or508
|
coil≤10
|
2.Width Tolerance
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mm Nominal width
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(mm) Width tolerance
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|||
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Normal precision PW.A
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High precision PW.B
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|||
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Min
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Max
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Min
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Max
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|
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≥600-1200
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0
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+5
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0
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+2
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3.Application
Galvanized steel products are mainly used in construction,light industry, automobile,agriculture, animal husbandry, sishery and commercial business,etc. In construction industry, It is mainly used to make roof board and grill for industrial and civilian buildings; In light industry, it is mainly used to make casing of household electric appliances, civilian smoke stack and kitchen ware, etc.; In automobile industry, it is mainly used to make corrosion resistant parts; In agriculture, animal husbandry, fishery and commercial business, it is mainly used to make freezing appliances and packing equipment, etc.
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