HOT-DIP GALVANIZED STEEL COIL
Hot-dip galvanized steel coils are available with a pure zinc coating through the hot-dip galvanizing process. It offers the economy, strength and formability of steel combined with the corrosion resistance of zinc. The hot-dip process is the process by which steel gets coated in layers of zinc to protect against rust. It is especially useful for countless outdoor, marine and industrial applications.
| ASTM A653M-06a | EN10327:2004/10326:2004 | JIS G3302-1994 | |
| DX51D+Z | |||
| SS GRADE 230 | S220GD+Z | SGC340 | |
| SS GRADE 255 | S250GD+Z | SGC400 | |
| SS GRADE 275 | S280GD+Z | SGC440 | |
| SS GRADE 340 | S320GD+Z | SGC490 | |
| SS GRADE 550 | S350GD+Z | SGC570 | |
| S550GD+Z |
752MM--1250MM
0.13MM--3.5MM
60g/m²-350g/m²
508MM or 610MM
1. Clean the steel surface to remove any impurities, such as grease, rust, or mill scale. The cleaning process can be done using different methods, including mechanical cleaning, chemical cleaning, or a combination of both. After cleaning, the steel is rinsed with water to remove any residue.
2. Pre-treat the steel surface to improve the adhesion of the zinc coating. This is usually done by applying a chemical solution, such as a chromate or phosphate conversion coating. The pre-treatment stage also helps to prevent the formation of white rust on the surface of the zinc coating.
3. Apply the molten zinc coating to the steel surface through a hot-dip galvanizing process. In this process, the steel coil is immersed in a bath of molten zinc at a temperature of around 460 degree . The steel is held in the molten zinc for a specific period, depending on the thickness of the coating required. The thickness of the zinc coating can vary, but it is typically between 6 to 50 microns.
4. After the hot-dip galvanizing process, the steel coil is cooled and then subjected to post-treatment to improve the durability and appearance of the zinc coating. This may involve applying a clear coating for extra protection against environmental elements or chemical abrasion.
Usually, the trace element content in hot-dip galvanized steel coils is very low, which meets the relevant technical standards and regulatory requirements.
For example, the copper content should not exceed {{0}}.15%, the tin content should not exceed 0.05%, the cadmium content should not exceed 0.005%, and the content of elements such as aluminum, cobalt, and nickel should also be within a certain range.
1. Corrosion resistance: The zinc coating on hot-dip galvanized steel coil provides excellent corrosion resistance in even the harshest environments, such as exposure to saltwater or acidic chemicals.
2. Durability: Hot-dip galvanized steel coil is extremely durable and can withstand heavy use and wear without losing its protective coating.
3. Low maintenance: The coating on hot-dip galvanized steel coil requires very little maintenance, making it an ideal choice for applications where regular upkeep may be difficult or costly.
4. Cost-effective: Hot-dip galvanized steel coil is an affordable option compared to other coatings, such as stainless steel or paint.
5. Sustainability: Hot-dip galvanized steel coil is a sustainable choice, as the zinc coating can be recycled and reused, reducing waste and conserving resources.
1. Construction: The construction industry uses hot-dip galvanized steel coil in many applications, including roofing, fences, handrails, and structural components such as beams and columns. The steel's durability and resistance to corrosion make it an excellent choice for buildings in coastal areas or areas with high humidity levels.
2. Automotive industry: Hot-dip galvanized steel coil is also widely used in the automotive industry. It is used for the production of various parts such as car bodies, chassis, and undercarriage components. The steel's strength and durability make it an ideal material for cars that need to withstand harsh weather and road conditions.
3. Electrical industry: Hot-dip galvanized steel coil is used in the electrical industry for the production of transmission towers, power distribution poles, and other electrical equipment. The steel's corrosion resistance helps protect the equipment from the harsh outdoor environment.
4. Agriculture: This type of steel coil is used in the agriculture industry for tools, equipment, and for construction of farm buildings. It is commonly used for fencing, animal enclosures, and structural components of buildings.
5. Furniture Industry: Hot-dip galvanized steel coil is used in the furniture industry for the production of outdoor furniture. The steel's weather resistance makes it ideal for outdoor tables, chairs, and other furniture that must withstand various weather conditions.




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