Galvalume steel is coated with an aluminum-zinc alloy. This coating provides excellent corrosion resistance and heat reflectivity, making it a popular choice for roofing and other construction applications. There are two main processes used to produce Galvalume steel: continuous hot dipping and electro-galvanizing. 

A zinc & aluminum coating is one of the most effective and economical methods of protecting bare steel from a corroding environment. The AlZn not only serves as a barrier between the steel and the environment, but it will also sacrifice itself to protect the underlying steel sheet. Sacrificial or galvanic protection occurs when two dissimilar metals are in contact and coupled with water and oxygen. Aluminum & Zinc corrodes preferentially to the iron in steel. This protection prevents corrosion of the steel at areas not covered with zinc & Al. Thus, the spread of corrosion from cut edges, drill holes, etc. is minimized.

Application：Architecture；Household Appliances；Automobile；Industrial Instrument.