55% Al-Zn Alloy Coated Steel is very suitable for building envelope systems such as roofs, walls, eaves, etc.
Why is it suitable for building enclosures?
(1) Excellent corrosion resistance
Aluminum-zinc alloy coating (55% aluminum + 43.4% zinc + 1.6% silicon) is more corrosion-resistant than traditional galvanized steel (pure zinc), especially in highly corrosive environments such as humidity, acid rain, and coastal areas, where the service life can be extended by 2-6 times.
The salt spray test can last for more than 1,000 hours (about 500 hours for ordinary galvanized sheets), reducing the risk of rust.
(2) High temperature and UV resistance
It can withstand high temperatures of 315°C for a long time (400°C for a short time), which is suitable for scenes such as metal roofs that are directly exposed to sunlight to avoid coating aging.
The aluminum layer reflects ultraviolet rays, reduces heat radiation, and has better energy-saving effects than ordinary steel plates.
(3) Lightweight and strength
The base plate is made of high-strength low-carbon steel (such as DX51D, SGH340), which is light in weight but strong in pressure bearing capacity, and is suitable for large-span enclosure structures.
(4) Convenience of construction
It can be directly processed into corrugated steel plates (such as corrugated plates, hidden lock edge plates), wall panels or ventilation components, and is compatible with bolt fixing, welding or snap-fit installation.
55% aluminum-zinc alloy coated steel compared with ordinary galvanized steel and stainless steel
|
Comparison items |
55% aluminum-zinc coated steel |
Ordinary galvanized steel (GI) |
Stainless steel |
|
Cost |
Medium (cost-effective) |
Low |
High |
|
Lifespan |
20-30 years (conventional environment) |
10-15 years |
More than 30 years |
|
Applicable scenarios |
Medium to high corrosion building enclosure |
Low corrosion indoor environment |
Extreme corrosive environment |
Recommended use
Surface treatment:
When exposed directly, choose a matte or textured surface to reduce reflections.
When a higher decorative effect is required, a PVDF coating can be applied (available in a variety of colors, with further improved weather resistance).
Installation precautions:
Avoid direct contact with copper and stainless steel (may cause electrochemical corrosion).
It is recommended to apply a special anti-corrosion paint (such as zinc-based paint) to the cut edges.
Case reference
Large venues: stadiums, airport terminals (such as using vertical lock-edge aluminum-zinc steel plate roofing).
Industrial buildings: factories, logistics warehouses (wall corrugated board + insulation layer).
Commercial facilities: shopping centers, exhibition halls (color-coated aluminum-zinc steel plate curtain wall)
55% aluminum-zinc alloy coated steel is also suitable for automobile manufacturing, household appliances such as refrigerator back panels, gas stoves, air conditioners, etc.
