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Classification and Symbols of Electroplated Tinplate and Hot-dip Galvanized Steel
Tinplate and Hot-dip galvanized steel are two popular and common metal plate materials used in the industry. In this article, the classification and symbols of electroplated tinplate and hot-dip galvanized steel are explained.
Tinplate, also known as electrolytic tinplate, is galvanized steel sheet coated with a thin layer of tin by electroplating. It is one of the most widely used and economical metallic packaging materials in the world. Tinplate is popular for its good corrosion resistance, formability and soldering properties. It is usually used for the production of cans, food containers and metal boxes.
Hot-dip galvanized steel is also known as hot-dipped galvanized iron (HDG). It is produced by immersing the steel in a bath of molten zinc to form a corrosion-resistant layer of zinc (cathode). The zinc layer provides a strong physical bond between the steel and the zinc coating and protection against corrosion. Hot-dip galvanized steel is often used for outdoor structures, such as poles for electric power transmission and as fence posts for applications such as livestock farming and vineyards.
Classification of electroplated tinplate and hot-dip galvanized steel
Electroplated tinplate and hot-dip galvanized steel are both classified according to the thickness and corrosion resistance of the coating. The thickness of electroplated tinplate is usually expressed in weight per area. Common thicknesses are 0.2mm, 0.3mm, 0.4mm and so on. For hot-dip galvanized steel, the thickness is expressed in the steels coating weight expressed in ounces per square foot. Common coating weights are G60, G90 and G120.
Symbols of electroplated tinplate and hot-dip galvanized steel
The symbols of electroplated tinplate and hot-dip galvanized steel depend on the coating type and thickness. The symbols of electroplated tinplate are expressed in variations of the following: Tinplate-M (thickness) /EG (electro-galvanised). Common symbols are Tinplate-M/ 0.02mm/EG, Tinplate-M/0.03mm/EG and so on. The symbols of hot-dip galvanized steel are expressed in variations of the following: Galvanized Steel-M (thickness) /HDG (hot-dip galvanizing). Common symbols are Galvanized steel-M/ G60/HDG, Galvanized steel-M/G90/HDG and so on.
Conclusion
This article explained the classification and symbols of electroplated tinplate and hot-dip galvanized steel. Tinplate is widely used for its corrosion resistance, formability and soldering properties. Hot-dip galvanized steel is often used for outdoor structures. Both electroplated tinplate and hot-dip galvanized steel are classified according to the thickness and corrosion resistance of the coating. The symbols of electroplated tinplate are expressed as Tinplate-M/ thickness/EG, while the symbols of hot-dip galvanized steel are expressed as Galvanized Steel-M/ thickness/HDG.
