Galvanized steel products are made by cleansing and heat-treating rolled coils before dipping them into a bath of molten zinc. Through this process, the coils are plated with zinc only (GI), zinc and iron (GA) or zinc, aluminum and magnesium (PosMAC).
Product | Coating Layer Structure | Characteristics | Common Uses |
---|---|---|---|
GI (Galvanized Steel) |
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Furniture, office appliances, inner & outer panels of home appliances, substrates for painting, automobile inner plates, pipes, construction materials | |
GA (Galvannealed Steel) |
|
Inner & outer panels of home appliances and automobiles |
The product can be used in various applications such as construction materials, pipe, electronics, furniture, materials with molten zinc to the hot rolled or cold rolled steel products.
Product | Coating Layer Structure | Characteristics | Appearance |
---|---|---|---|
GI(H) | A hot rolled steel plate is used as a base metal for this product. While molten zinc solidifies on the surface of the steel sheet, normal zinc crystallization is suppressed creating fine crystals. | ||
GI | A cold rolled steel plate is used as a base metal for this product. While molten zinc solidifies on the surface of the steel sheet, normal zinc crystallization is suppressed creating fine crystals. The surface is flat and has a fine appearance after painting. Paintability is superior to ordinary products. | ||
GA | Through a thermal diffusion process, a steel sheet and zinc react to produce an alloy layer. The weldability and the paintability are superior to traditional galvanized steel sheets. Fe in the alloy coating enhances corrosion resistance. |
Post-Treated Galvanized Steel
Product | Post-Treatment Code | Full Name | Quality Features | Remarks |
---|---|---|---|---|
GI(H) | NH | Non Chromate HGI | Corrosion Resistance | Gwangyang |
NP | Non Chromate Pohang | Corrosion Resistance | Pohang | |
CL | Chromate-Light | Corrosion Resistance | Gwangyang, Pohang | |
GI | NC | Non Chromate | Corrosion Resistance | Gwangyang |
NE | Non Chromate Excellent | High Corrosion Resistance | Gwangyang | |
NW | Non Chromate Weldability | Corrosion Resistance, Weldability | Gwangyang | |
GA | LP | Lubrication Phosphate | Lubrication | Gwangyang |
LM | Lubrication Metallic | Lubrication, Weldability | Gwangyang |