Galvanized coil is a corrosion-resistant steel coil product. A zinc coating is formed on the surface of the steel coil through the galvanizing process, improving its corrosion resistance. Galvanized coil can be divided into two categories: hot-dip galvanized coil and electro-galvanized coil, depending on the galvanizing method and thickness.
1. Hot-dip galvanized coil: Hot-dip galvanizing involves immersing the steel coil in molten zinc, coating it with a zinc layer. This coating offers advantages such as uniform coating, strong adhesion, and excellent corrosion resistance. Depending on the thickness of the galvanized layer, hot-dip galvanized coil can be categorized as standard hot-dip galvanized coil, tin-coated hot-dip galvanized coil, and alloy hot-dip galvanized coil.
Standard hot-dip galvanized coil: The galvanized layer thickness generally ranges from 20-60g/m² and is suitable for general construction, furniture, and home appliances.
Tin-coated hot-dip galvanized coil: An appropriate amount of tin is added to the galvanizing pot to improve the corrosion resistance of the galvanized layer, making it suitable for applications requiring even higher corrosion resistance.
Alloy hot-dip galvanized coil: Adding alloy elements such as aluminum and magnesium to the galvanizing solution can improve the mechanical strength and corrosion resistance of the coating.
2. Electro-Galvanized Coil: Electro-galvanizing involves electrochemically coating steel coils with zinc, creating a uniform, fine zinc layer. Electro-galvanized coils have a silvery, shiny appearance and excellent corrosion resistance. Based on the thickness of the zinc coating, electro-galvanized coils can be divided into general-purpose and high-performance electro-galvanized coils.
General-purpose electro-galvanized coils: The zinc coating thickness generally ranges from 8-20 g/m² and are suitable for general construction, automotive, furniture, and other applications.
High-performance electro-galvanized coils: The zinc coating thickness can reach 30-70 g/m², offering improved corrosion resistance and mechanical properties, making them suitable for applications with specialized requirements.
In general, there are certain differences between hot-dip galvanized coils and electro-galvanized coils in terms of production processes and application areas. Choosing the appropriate galvanized coil product depends on the specific application requirements and environment.
Post time: Sep-03-2025