Galvanized Steel Coil
Width:30-1500mm Thickness:0.12-4.0mm Length: as per the customer's requirement
Description
Product Details
|
Standard |
AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc. |
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Material |
SGCC/ CGCC/ DX51D+Z, etc. |
|
Thickness(mm) |
0.12-4.0mm |
|
Width(mm) |
30mm-1500mm |
|
Tolerance |
Thickness: ±0.01 mm Width: ±2 mm |
|
Coil internal diameter |
508-610mm or as per your request |
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Zinc Coating |
30g - 275g / m2 |
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Spangle |
Big spangle, Regular spangle, Mini spangle, Zero spangle |
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Surface Treatment |
Coated, Galvanized, Clean, Blasting, and Painting according to customer requirement |
What are the characteristics of galvanized coils?
A galvanized coil is a thin steel plate that is immersed in a molten zinc bath so that a layer of zinc adheres to the surface. At present, continuous galvanizing technology is mainly used for production, that is, the rolled steel plates are continuously immersed in a plating bath containing molten zinc to make galvanized steel plates; and alloyed galvanized steel plates. This kind of steel panel is also made by the hot dip method, but it is heated to about 500°C immediately after coming out of the tank to form an alloy film of zinc and iron. This kind of galvanized coil has excellent paint adhesion and weldability.
1. Passivation: Passivation treatment of the galvanized layer can reduce the occurrence of fold rust (white rust) under humid temperature storage and transportation conditions. However, the anti-corrosion properties of this chemical treatment are limited and hinder the adhesion of most coatings. This treatment is generally not used in zinc-iron alloy coatings. In addition to the smooth surface, as a routine, manufacturers perform passivation treatment on other types of zinc coatings.
2. Oiling: Oiling can reduce the corrosion of steel plates under humid storage and transportation conditions. Applying oil to steel plates and steel strips after passivation treatment will further reduce corrosion under humid storage conditions. The oil layer should be removable with a degreasing agent that will not damage the zinc layer.
3. Paint seal: Applying an extremely thin layer of transparent organic coating film, can provide an additional anti-corrosion effect, especially fingerprint resistance. Improves lubricity during molding and serves as an adhesive base for subsequent coatings.
4. Phosphating: Through phosphating treatment, galvanized steel sheets with various coating types can be coated without further treatment except for normal cleaning. This treatment can improve the adhesion and anti-corrosion properties of the coating and reduce the risk of corrosion during storage and transportation. After phosphating, it can be used with a suitable lubricant to improve the molding performance.
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