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Galvanized Steel Coil
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- Product Description
-
Galvanized steel coils, where thin steel sheets are dipped in a molten zinc bath so that a layer of zinc adheres to their surface. The main use of continuous galvanizing process production, that is, the coils of steel plate continuous dipped in the melting of zinc in the plating tank made of galvanized steel; alloying galvanized steel. This kind of steel plate is also manufactured by hot dipping method, but immediately after leaving the tank, it is heated to about 500 ℃, so that it generates zinc and iron alloy coating. This galvanized coil has good paint adhesion and weldability.
Specification
Material
Steel, Zinc Alloy
Standard
SGCC, ASTM A653/653M, ASTM A36, JISG302, etc
Grade
DX51D, DX52D, DC51D, DX54D, SGCC, SGCD, SECC, etc
Thickness
0.12-3.50mm
Width
100-1250mm
Zinc Layer
30-275g/㎡
Inner Diameter
508/610mm
Coil Weight
3-4tons, 4-6tons or according to customer requirements
Spangle
no spangle, minimized spangle, maximum spangle, regular spangle
Surface Treatment
oiled, passivated or chrome-free passivated, passivated + oiled
MOQ
36 tons
Delivery Time
about 35 days
Package
Standard export package
Applications
Galvanized steel coil is widely used in ship, automobile, Bridges, buildings, machinery, pressure vessels and other manufacturing industries.
1. Building & Construction：Roofing; Terrace; Window Frame;
2. Door：Rolling-up Door; Shutter; Mobile House;
3. Interior Decorations：Wall; Door Frame; Steel Structure; Screen; Ceiling; Elevator.
4. Household Appliances：Fridge; Washing Machine; Microwave Oven; Air-Conditioner; Duplicating Machine, etc.
Advantages
1. Strong anti-corrosion properties: galvanized steel coils undergo a number of processes such as hot-dip galvanizing during the production process, forming a uniform and dense zinc layer, which can effectively isolate the steel coils from contact with the external environment, thus preventing the purpose of corrosion. The zinc layer has good corrosion resistance and can maintain the corrosion resistance of the steel coil for a long period of time, even in harsh environments.
2. Good durability: Due to the excellent anti-corrosion properties of galvanized steel coils, the surface condition and service life of steel coils can be maintained for a long time. The zinc layer on the surface of steel coils can also play a role in reducing oxidized corrosion and prolonging the service life.
3. Aesthetically pleasing: galvanized steel coils have a good appearance, usually using galvanizing, spraying and other processes, you can form a layer of beautiful and strong outer layer on the surface of the steel coil. This kind of surface treatment is low-cost, but also has a high applicability, suitable for a variety of different occasions and environments.
4. Good processing performance: galvanized steel coils have good processing performance, whether it is shearing, stamping, bending or welding, can easily cope with different design needs. Its good ductility and plasticity make the galvanized steel coil not easy to break or deformation in the process, to ensure the stability and consistency of product quality.
5. Wide range of applications: Galvanized steel coils are widely used in various fields such as construction, furniture, automobile, electrical appliances and machinery.
6. Good economy: galvanized steel coils have significant cost advantages. Its corrosion resistance extends the service life of the material and reduces the frequency of replacement and repair due to corrosion, thus reducing long-term maintenance costs. In addition, the production process of galvanized steel coil is relatively mature, high production efficiency, cost control, making its market price competitive.
7. Good environmental friendliness: With the increasing awareness of environmental protection, recycling of used galvanized steel coils has become an industry trend, providing an additional source of income for enterprises. This further enhances the economic and environmental value of galvanized steel coils.
Process
1. Coil pickling: Steel coils to be galvanized are put into the acid solution for pickling with the purpose of removing oxides, oils and rusts from the steel surface to ensure the galvanizing effect.
2. Cleaning: After pickling, the surface of the steel coil is rinsed with water to remove residual acid and harmful substances such as chloride ions.
3. Pre-treatment: Put the cleaned steel coil into the pre-treatment tank to form a protective film on the steel surface through chemical reaction to increase the bonding force between the steel coil and the zinc solution and improve the quality of the coating.
4. Baking: After pretreatment, the steel coil is baked to make it completely dry for the subsequent zinc dipping process.
5. Zinc dipping: The baked coil is dipped into molten zinc to form a zinc layer to protect the coil from corrosion. The dipping time and temperature are adjusted according to requirements to achieve the desired galvanizing quality. 5.
6. Cooling: After dipping, the coils are cooled to allow the zinc layer to solidify quickly and to ensure the quality of the coating.
7. Coiling: After cooling, the galvanized steel coils are re-coiled and inspected for quality, including coating thickness, adhesion, and uniformity.
Galvanized Steel Coil
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