What is Galvanized Coil？

Galvanized steel coil is a type of steel coil that has been coated with a layer of zinc to protect it from rust and corrosion. The process of galvanization involves immersing the steel coil in a bath of molten zinc, which creates a metallurgical bond between the zinc and the steel. It results in rust and corrosion resistance.

Galvanized steel coil is one of the hot-selling products of Zhongxi Metal. It is available in big, regular, small, and zero spangles. Compared to color steel coil, it is more affordable. Also, it has excellent corrosion resistance and durability. That’s why it is extensively used in construction, automobile, furniture, home appliances, etc. Due to its wide applications and good machinability, it is also a great investment project. As a wholesale supplier, Zhongxi Metal has its own factory to meet bulk orders timely. Also, we will offer a direct-sale price to lower your cost. If you are interested, please contact us for details!

Types of Galvanized Coil

Hot-dip Galvanized Steel Coil

As the name implies, the steel sheet is immersed in the molten zinc bath continuously so that the coil is covered with a layer of zinc on its surface. Hot-dip galvanizing is immersing the cleaned iron sheet into the molten zinc bath at about 450 degrees to form a zinc layer. The zinc content should not be less than 99%. It is the most commonly used method.

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 basically ensures the same performance as cold rolled sheets through cold galvanizing. Also, it is able to enhance the corrosion and heat resistance of steel. Its surface is smooth and uniform, and it has good workability. 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. However, the zinc coating is thinner, and the corrosion resistance is not as good as that of hot-dip galvanized coils.

Zinc-Iron Alloy Galvanized Steel Coil (ZF)

This kind of steel coil is also manufactured by the hot-dip galvanizing process. But it is heated to about 500 ℃ immediately to form an alloy coating of zinc and iron after it is out of the zinc bath. This galvanized coil has good coating adhesion and weldability. That is, it can be painted directly without further treatment, other than cleaning. The color is matt off-white, and it appears dark gray after oiling and it has no spangles. It is perfect for making rolling shutters, signboards, panels of vending machines, refrigerators, washing machines, display cabinets, office cabinets, etc.

Advantages of Galvanized Coil

One of the main advantages of galvanizing steel is its superior resistance to corrosion and rust. This makes it ideal for use in outdoor environments where metal components would otherwise be exposed to harsh weather conditions. Galvanized steel does not require additional maintenance as its zinc coating will last many years without repainting or refinishing. This can save you time and money in the long run, as there’s no need for regular upkeep or repairs on your metal structures or equipment.

In addition, galvanized steel has excellent thermal properties, which make it suitable for use in commercial buildings such as warehouses and factories where insulation is essential. In this regard, galvanizing steel helps reduce energy costs since heat transfer between interior spaces and exterior surfaces is minimized. Furthermore, galvanizing steel allows you to achieve aesthetic effects with different types of finishes, including matte, semi-gloss, gloss, and satin finishes depending on your preferences.

• Strong anti-corrosion ability: The zinc layer can effectively prevent the steel from contacting with external oxygen, water and other substances, thereby extending the service life of the steel.

• Good weather resistance: The galvanized coil can resist the erosion of natural environmental factors such as sun and rain, and is not prone to oxidation and corrosion.

• Smooth and beautiful surface: After galvanizing, the surface of the galvanized coil presents a uniform, smooth and bright appearance, which has good decorative properties.

• Easy to process: The galvanized coil has good plasticity and weldability, which is convenient for various processing and connection operations, such as cutting, bending, stamping, etc.

Quality Control

We have our own Physical & Chemical Testing Center Lab to guarantee our product quality. Our test items & instrument fully meet international standards.

Applications of Galvanized Coils

Galvanized coil features lightweight, aesthetics, and excellent corrosion resistance. It can be used directly or as the base metal for PPGI steel. Therefore, GI coil has been a new material for many fields, such as construction, shipbuilding, vehicle manufacturing, furniture, home appliances, etc.

• Construction – They are often used as roofing sheets, interior and exterior wall panels, door panels and frames, the surface sheet of the balcony, ceiling, railings, partition walls, windows, and doors, gutter, sound insulation walls, ventilation ducts, rainwater pipes, rolling shutters, agricultural warehouses, etc.

• Home Appliances – GI coil is widely applied to home appliances, such as the back panel of air conditioners, and the outer casing of washing machines, water heaters, refrigerators, microwave ovens, switch cabinets, instrument cabinets, etc.

• Transportation – It is mainly used as decorative panels for cars, corrosion-resistant parts for cars, decks of trains or ships, containers, road signs, isolation fences, ship bulkheads, etc.

• Light Industry – It is ideal for making chimneys, kitchen utensils, garbage cans, paint buckets, etc. At Zhongxi Metal, we also make some galvanized products, such as chimney pipes, door panels, corrugated roofing sheets, floor decks, stove panels, etc.

• Furniture , such as wardrobes, lockers, bookcases, lampshades, desks, beds, bookshelves, etc.

• Other Uses, such as post and telecommunication cable, highway guardrails, billboards, newsstands, etc.

Product Inventory

As a leading company, we are known for our excellent product quality and professional services, providing our customers with a reliable partner. We have a global sales network that can meet the needs of customers in different countries and regions.