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Galvanized Steel Coil

Galvanized Steel Coil is a thin steel sheet that is dipped into a molten zinc bath to make the surface adhere to a layer of zinc. It is a very popular product, and there are different types to choose from, such as big, regular, small, and zero Spangles, etc., have good corrosion resistance and durability, and are widely used in furniture appliances, construction, automobiles and other industries. As the most famous wholesale supplier of galvanized coils in China, Future Metal has a large number of galvanized coils in stock, which can meet the needs of large orders and support the customization of galvanized coils of different specifications. If you need to buy galvanized coils, you can contact us Get the most discounted price, fast shipping, save your time and cost!

GI Coil with Spangles

Parameters of galvanized steel coil

Item	Galvanized steel coil
Width	600-1250 mm
Thickness	0.2- 3 mm
Design	Wave,Trapezoid, Tile, etc，Support customized
Surface Structure	Zero spangles, Small spangles, Regular spangles, Big spangles
Zinc Layer Thickness	30 g-275 g/㎡
MOQ	5 tons
Package	Standard Seaworthy Package

prepainted galvanized steel coil

galvanized iron coil

galvanized coil stock

Standard: AISI, ASTM, BS, DIN, GB, JIS, EN
Technique: Cold Rolled, Hot Rolled

Material: Can be customized according to customer requirements

Different sizes and standards can be customized according to customer requirements, you can send us your specific requirements to get an accurate quotation !

Galvanized steel coil types

According to the processing method, we divide galvanized steel into the following categories:

1. Electro-galvanized Steel Coil
Electro-galvanizing is a process of applying a layer of zinc to steel through electroplating, with a saline anode and steel conductor. It is able to enhance the corrosion and heat resistance of steel. Its surface is smooth and uniform. Also, it looks shiny and silver-white, which is more beautiful than a hot-dip one. Moreover, it is cheaper than hot-dip galvanized steel.

2. Hot-dip Galvanized Steel Coil
As the name implies, hot-dip galvanizing is immersing the cleaned iron sheet into the molten zinc bath at about 500 degrees to form a zinc layer. It is the most commonly used method. It has some advantageous features:

1) The entire steel surface is uniformly covered with a zinc layer, even the corners, hollows, etc. so that the steel sheet is fully protected.

2) The zinc coating of hot dip galvanized steel is thick and tough, which offers superior corrosion resistance. So it is more durable to use. At Future Metal, the maximum zinc layer thickness can reach up to 275 g/㎡.

Hot-dip Galvanized Steel Coil

GI Coil at Factory

Differences Between Hot-dip and Electro Galvanized Coils：

1. Resistance to Corrosion
The corrosion resistance of hot-dip galvanized coil is much better than that of an electro-galvanizing one. It is because of the thickness of the zinc layer and the adhesion between the base metal and zinc layer.

2. Thickness of Zinc Layer
Generally, the thickness of the electro-galvanizing layer is 5~15 μm, and the hot galvanizing layer is often more than 35 μm, or even as high as 300 μm.

3. Applications
Hot-dip galvanizing products are widely used in transportation, building, communication, electric power, energy, automobile, petrochemical, home appliances, and other industries. While the electro-galvanized coil is more suitable for small parts, or indoor environments, etc.

4. Appearance
The appearance of the electro-galvanized coil is more smooth and bright. While the surface of the hot-dip galvanized coil is rough and dull.

galvanized steel coil

Spangle is formed during the hot-dip galvanizing process. The size, brightness, and surface of spangles mainly depend on the composition of zinc layer and the cooling method. According to the size, it includes small spangles, regular spangles, big spangles, and free spangles. They look different, but the spangles almost will not influence the quality of galvanized steel. You can choose according to your preference and purpose.

Big spangle

Regular spangle

Small spangle

Zero spangle

Features of galvanized coil

1.Wide Applications

GI sheet roll is easy to process for different purposes. It is widely used in construction, home appliances, automobile containers, transportation, etc.

2. Easy to Transport

Compared to GI steel sheets, coils are easier to transport. In this way, it will save your shipping cost.

3. Cost-effective Solution

Compared to GL or color coated steel coils, the galvanized coil is the most cost-effective solution but with similar features, such as great corrosion resistance, good appearance, etc.

Applications of galvanized steel coil

Galvanized steel coil can be widely used in different applications after further processing, such as:

1. Home Appliances

GI coil is widely applied to home appliances, such as the base of washing machines, water heaters, refrigerators, microwave ovens, etc.

2. Transportation

It is mainly used as decorative panels of cars, decks of trains or ships, containers, road signs, etc.

3. Furniture, such as wardrobe, locker, radiator, lampshade, table, bed, bookcase, shelf, etc.

4. Construction

They are often used as roofing, interior and exterior wall panels, the surface sheet of the balcony, ceiling, partitioning walls, windows and doors, gutter, barn, sound insulation wall, etc.

5. post and telecommunication cable, highway guardrail, billboards, etc.