Galvanized coil, referred to as galvanized sheet or galvanized steel sheet. Galvanized coils are produced using hot-rolled steel strips or cold-rolled steel strips as base plates through a continuous hot-dip galvanizing process. Hot-dip galvanized sheets are supplied as rectangular flat sheets after cross-cutting; hot-dip galvanized coils are supplied as rolls after being rolled.

The surface of galvanized coils is smooth, not only has high corrosion resistance, but also has beautiful appearance. It is widely used in construction, home appliances, automobiles and other industries.

The main material of galvanized coil is cold rolled steel plate. Cold-rolled steel plate refers to a steel plate processed by hot-rolled plate or hot-rolled steel strip through cold rolling process. Compared with hot-rolled steel plates, cold-rolled steel plates have a smoother surface and higher dimensional accuracy. This makes cold rolled steel sheets a better base material for galvanized coils.

Before making galvanized coils, cold-rolled steel sheets undergo a series of pre-treatment steps, such as degreasing, cleaning and heating. Then, the cold-rolled steel sheet is immersed in molten zinc liquid containing zinc components through the dipping method. At high temperatures, zinc reacts with the steel surface to form a uniform, dense zinc-iron alloy layer. This forms our common galvanized coil. Since zinc has good corrosion resistance, galvanized coils are not easily affected by oxidation and corrosion, so they have good anti-corrosion effects.

In addition to cold-rolled steel sheets, galvanized coils are also coated with a protective coating. This coating can provide better corrosion protection and extend the service life of galvanized coils.

Generally speaking, the coatings of galvanized coils are mainly divided into organic coatings and inorganic coatings. Organic coatings are composed of organic resins and pigments and have good weather resistance and decorative properties. Inorganic coatings are composed of inorganic substances such as phosphating or silicides and have better corrosion resistance.

Specifications

Galvanized steel Grade

What is a Galvalume steel coil?

The alloy coating of Galvalume steel coil is composed of about 55% aluminum, about 43.5% zinc and about 1.5% silicon. Compared with traditional galvanized products, it has better corrosion resistance, heat resistance and heat reflection.

The surface of Galvalume steel coil has fine and uniform zinc flowers, bright color, high surface hardness, and can be coated with a variety of colors of fingerprint resistant semi-permeable film, which is widely used in household appliances, construction, structure, electrical appliances and other industries.

Specifications

Galvalume steel Grade

What is Galvalume material?

Galvalume steel plate is an alloy structure. Its main components are aluminum, which accounts for about 55%, and zinc, which is 43.4%. In addition, 1.6% silicon is added, and it is formed after high temperature.

Characteristics of Galvalume steel plate

1. Corrosion resistance: The atmospheric corrosion resistance and moisture gas corrosion resistance of aluminum-zinc-silicon plate are better than that of galvanized plate. It can be used as a variety of internal and external building materials and parts in an all-round way.

2. Good economy: The production cost is lower than that of galvanized and aluminum plated plates.

3. Heat reflectivity: The heat reflectivity of galvanized steel plate is very high, twice that of galvanized steel plate. Its service life is longer, so the cost performance is also very high. It can also withstand high temperatures of more than 300 degrees. People often use it as heat insulation material, which can be used in chimney pipes or fluorescent lamps, etc.

4. It is easy to paint, has relatively good adhesion ability, and can be painted without weathering treatment, so it can be painted directly on the board.

In addition, the processing performance and spraying performance are very superior, and it can be used in construction, including automobiles, home appliances, etc.