1. Electro-galvanized: The thickness of the electro-galvanized layer is usually 5-15μm, while the hot-dip galvanized layer is generally above 35μm, even as high as 200μm. 2. Hot-dip galvanizing: Durable and anti-corrosion, standard quality hot-dip galvanized anti-rust thickness makes it have excellent durability; the toughness of the coating is strong, the hot-dip galvanized galvanized layer forms a unique smelted metal structure, This metal structure can withstand mechanical damage during transportation and use. 3. Cold galvanized: Has good environmental performance. Most cold galvanizing solvents and thinners do not contain toxic organic solvents, and the cold galvanizing process also reduces the volatilization of organic solvents and reduces drying energy consumption. Conducive to environmental protection.