Advantages and Limitations in aluminium formwork 

advantages :
Aluminum oxidizes quickly, and the resulting surface coat of aluminum oxide resists further corrosion, by air, water, and chemicals. This protective coating is clear, colorless, and non-staining.
Aluminum can be easily colored by anodization, and holds paint extremely well. Aluminum can be finished in various ways.
Aluminum conducts electricity even better than copper.
Aluminum is 100% recyclable without losing any of its natural characteristics.
Aluminium has the highest strength-to-weight ratio of any metal.
For applications where magnetism needs to be avoided, aluminum is an excellent choice.
Disadvantages :
Aluminum requires special processes to be welded.
It is abrasive to tooling, or more accurately, the aluminum oxide coating that forms upon it is.
It is more expensive than steel