Brief description of galvalume steel coil
Galvalume steel coil is Zn—Al alloy, and the coating composition is 55% Al, 43.3% Zn, 1.6% Si. The surface of this steel coil is smooth and has excellent atmospheric corrosion resistance. Its atmospheric corrosion resistance is 2 to 6 times higher than that of hot-dip galvanized steel with the same coating thickness; It can be used for a long time at a high temperature of up to 315 °C, and it can be used for a long time at a temperature of 500 °C to 600 °C. Galvalume steel coil has both the characteristics of hot-dip galvanized steel and hot-dip aluminized steel sheet, and is gradually replacing galvanized coil and is widely used all over the world.
Characteristics of galvalume steel coil
1. Heat reflectivity
The heat reflectivity of galvalume steel coil is very high, twice that of galvanized steel, and people often use it as a thermal insulation material.
2. Heat resistance
Galvalume steel coil has good heat resistance and can withstand high temperature of more than 300 degrees Celsius, which is very similar to the high temperature oxidation resistance of aluminized steel plate.
3. Corrosion resistance
The corrosion resistance of galvalume steel coil is mainly due to the protective function of aluminum. When the zinc is worn away, the aluminum forms a dense layer of aluminum oxide, preventing corrosion-resistant substances from further corroding the interior.
4. Economy
Because the density of 55% AL-Zn is smaller than that of Zn, the area of the galvalume steel coil is more than 3% larger than that of the galvanized steel under the same weight and the same thickness of the gold-plated layer.
5. Easy to paint
It has excellent adhesion between the galvalume steel coil and the paint, and can be painted without pretreatment and weathering treatment.
Application of galvalume steel coil
The pictures above are some application scenarios of galvalume steel coils. Its main uses are as follows:
1. Construction industry
Housing quality, exterior walls, garage doors, photo fences, shutters, etc. of civil and industrial buildings.
2. Home appliance industry
Ovens, refrigerator backplanes, explosion-proof strips, air conditioners, electrical cabinets, large solar water heaters, electrical components.
3. Automobile industry
Automobile trimmers, automobile body parts, exhaust pipes, wiper accessories, fuel tanks.
4. Others
Heat insulation cover, heat exchanger, dryer, water heater, etc.
The difference between galvalume steel coil and galvanized coil
Due to different coatings, they have different characteristics, the main differences are as follows:
1. Different coating
In order to prevent the surface of the steel plate from being corroded and prolong its service life, the galvanized steel coil is coated with a layer of metal zinc on the surface of the steel plate. The surface of the galvalume steel coil has a unique smooth, flat and gorgeous star flower, and the base color is silver white. Its surface coating is 55% aluminum, 43.4% zinc and 1.6% silicon.
2. Different service life
The special coating structure makes it have excellent corrosion resistance. The normal service life of the galvalume steel coil is 2-6 times that of the ordinary galvanized coil.
3. Different corrosion resistance
The corrosion resistance of galvalume steel coil is stronger than that of galvanized coil.
HDT tubing is a galvalume steel coil Supplier in China
HDT Tubing Co., Ltd (https://www.hdtsteel.com) is a professional galvalume steel coil supplier in China. The company has advanced production equipment, strong technical strength and perfect after-sales service. The galvanized pipe products are well stocked and the quality is guaranteed. Our company provides the best quality products and the best price, and provides 24-hour online service to solve customer problems in a timely manner.
