Hot dipped galvanized steel (HDG) is a form of galvanized material, which has a tough zinc coating and excellent corrosion resistance. While it is much cheaper than stainless steel. Considering its great durability and shiny surface, it is widely used in many applications, including roofing, wall panels, doors, steel structures, etc. Below let's review more details about HDG steel.
Hot Dipped Galvanized GI Steel Coil
What Is Hot Dip Galvanizing Steel?
As mentioned, hot dip galvanizing is a form of galvanization. Galvanizing is a process where zinc coating is applied to the base metal to prevent the steel from corroding. While hot dip galvanizing only refers to a zinc coating formed by immersing the metal into zinc molten at a temperature of about 450 °C. Compared to the electro galvanizing layer (10－50 g/m2), hot-dip galvanized zinc layer will be much thicker, which can reach up to 600 g/m2. And the tough protective zinc coating provides superior corrosion resistance. That's why HDG steel is very popular in many applications.
Applications of Hot Dipped Galvanized Steel
Hot dipped galvanized steel (HDG) is ideal for the applications, such as roofing, wall panels, framing, siding, structural steel beams, pipes, railing, etc. It is popular in the fields such as construction, home appliances, automobiles, containers, and transportation. Especially, you can find it in steel structure construction, automobile manufacturing, steel silo manufacturing and other industries. Also, the zinc coating also makes the metal sheet smooth and shiny. So it is also widely used as the back panel of the indoor unit of the air conditioner, cabinet, etc. If another color is desired, it is easily painted.
Advantages of Hot Dipped Galvanized Steel
1. Strong Resistance to Corrosion
Through hot dip galvanizing process, the base metal will be coated with a thick zinc protective coating. The thick zinc layer offers a strong antioxidant ability to prevent the steel coil from rusting and prolong its service life.
2. Comprehensive Protection
The entire steel surface is uniformly covered with a zinc layer, even the corners, hollows, etc. so that the steel coil is fully protected. That's why the hot galvanized steel is more durable.
3. Decorative Performance
After galvanizing, the steel coil looks bright and shiny so that it can be used directly without decoration.
4. Good Processing Formability
HDG steel is easy to process for different uses. That's why galvanized steel coil is a great choice for investment.