Aluminized Steel Type 2 was developed for superior environmental corrosion resistance. Aluminized steel Type 2 combines the strength and fire resistance of steel with the corrosion resistance of pure aluminium. By using Aluminized Steel Type 2 jacketing, operators can lower maintenance costs and increase safety. It has a pure aluminium coating on both sides of the steel substrate.
The combination of high quality steel and aluminium offers excellent resistance at temperatures up to 1,100°C. At the same time, the aluminium coating helps to maintain the strength of the steel at high temperatures. In the case of a high temperature fire, the aluminium coating diffuses into the steel to form a hard iron- aluminium alloy layer which reinforces the substrate. Protection is maintained throughout the development of a fire. Up to 450°C there is no change in the steel substrate and absolutely no damage to the coating. It maintains the protection, even after two hours at 1,100°C.
Coating Structure
The Aluminized Steel Type 2 coating microstructure is comprised of two layers: an aluminum layer and an underlying hard aluminum-iron intermetallic alloy layer. The alloy arises from interaction of molten, commercially pure aluminum with the steel surface and is the agent that bonds the coating to the substrate. The alloy is an essential part of the coating protection system, supplementing the aluminum layer and providing a second line of defense to ensure long term durability. Control of the alloy layer thickness and thickness uniformity assures the degree of coating formability necessary for corrugated steel pipe manufacture.
ALUZINC
Aluzinc is formed from Aluminium (55%), Zinc (43.4%) and Silicon (1.6%) .
Due to its properties. Aluzinc widely used in various sectors, offering different benefits to each.
The popular industries for use include: