1. Classification by coating type
According to the type and purpose of the coating, galvanized steel sheets can be divided into the following categories:
(1) Polyester coating (PE) galvanized steel sheets
Polyester coating is a common coating with the main characteristics of good weather resistance, corrosion resistance and strong adhesion. Polyester coating is suitable for various indoor and outdoor environments, especially for use under normal climatic conditions. Its surface is flat and smooth, suitable for use in building materials, home appliance product shells, etc.
(2) Fluorocarbon coating (PVDF) galvanized steel sheets
Fluorocarbon coating galvanized steel sheets have excellent weather resistance and UV resistance, strong corrosion resistance, and are suitable for long-term exposure to harsh climatic environments. Fluorocarbon coating is often used in high-end building exterior walls, decorative panels and other high-demand places. Due to its good color retention and anti-pollution performance, it is suitable for products with high appearance requirements.
(3) Soybean oil coating (SMP) galvanized steel sheets
Soybean oil coating galvanized steel sheets use soybean oil-based environmentally friendly coatings with good oxidation resistance and weather resistance. It is not only environmentally friendly, but also can effectively reduce the emission of harmful substances and meet the green building standards. It is often used in household building materials and interior and exterior decoration, and has good decorative and practical properties.
(4) PVC coated galvanized steel coil
PVC coating is a coating commonly used in indoor environments, with good acid and alkali resistance and corrosion resistance. Due to the excellent processing performance and stability of PVC coating, it is often used in the external protective layer of some specific home appliances, automobiles and daily products.
2. Classification by galvanizing method
According to the different galvanizing methods of galvanized steel coils, galvanized steel coils can also be divided into the following categories:
(1) Hot-dip galvanized steel coils
Hot-dip galvanizing is to heat the steel coil to a certain temperature and then immerse it in molten zinc liquid to form a uniform galvanized layer. Since hot-dip galvanizing can form a relatively strong galvanized layer, hot-dip galvanized steel coils have stronger corrosion resistance and are suitable for use in harsh environments. Hot-dip galvanized steel coils are often used in places such as building exterior walls, bridges, and transportation facilities that require high corrosion resistance.
(2) Electrogalvanized steel coil
Electrogalvanizing is the process of depositing a zinc layer onto the surface of a steel coil by electrolysis. Compared with hot-dip galvanizing, the electrogalvanized layer is thinner and has poorer corrosion resistance. However, the production cost of electrogalvanizing is low and it is suitable for use in some environments where corrosion resistance is not required. It is widely used in home appliances, light industrial products and other fields.
3. Classification by coating process
According to the coating process, galvanized steel coils can also be divided into the following categories:
(1) Roller coating galvanized steel coil
The roller coating process is to evenly apply the coating on the surface of the galvanized steel coil through a roller coating device. The coating of this process is more uniform and smooth, with good decorative and corrosion resistance. The roller coating process is widely used in the fields of building decoration materials, home appliance shells, etc.
(2) Spray coating galvanized steel coil
The spray coating process is to spray the coating on the surface of the galvanized steel coil through a spray gun. It is usually suitable for products with complex shapes or coatings with special requirements. Spraying can make the coating thicker and more protective, which is suitable for some occasions with high customization requirements.
(3) Dip Coating Galvanized Steel Coil
The dip coating process is to immerse the galvanized steel coil into the coating tank, and the coating is covered on the steel surface by immersion. This process can obtain a thicker coating, which is suitable for applications that require enhanced corrosion resistance and durability. The dip coating process is common in coatings with high weather resistance requirements, such as fluorocarbon coatings.
4. Classification by application field
According to the application field of galvanized steel coils, common classification methods are:
(1) Galvanized steel coils for construction
The construction industry is one of the main application areas of galvanized steel coils. Galvanized steel coils are used for decoration of building facades, roof materials, wall materials, etc., and are widely used due to their corrosion resistance and aesthetics. Galvanized steel coils with different coating types and colors can be selected according to the requirements of different building designs.
(2) Galvanized steel coils for home appliances
The home appliance industry often uses galvanized steel coils to make the shells of home appliances such as refrigerators, washing machines, and air conditioners. Since the coating has good corrosion and wear resistance, this material can provide longer service life and higher appearance quality.
(3) Galvanized color coating coil for automobiles
In the automotive industry, galvanized color coating coil is often used in the manufacture of car bodies, doors, roofs and other parts. By using galvanizing and color coating technology, automobile manufacturers can improve the corrosion resistance of automobile parts and achieve more beautiful appearance design.
(4) Galvanized color coating coil for other industries
In addition to the above industries, galvanized color coating coil is also widely used in electronics, furniture, transportation facilities, agricultural facilities and other industries as an external protective layer or decorative material.