Zincaluminium Steel Water Storage Tanks are manufactured from steel sheet which has been continuously coated with zinc and aluminium. Aluminum in the coating provides barrier protection to the steel while the zinc element provides sacrificial cut-edge protection. Zincalume Water Storage Tanks are manufactured from steel sheet which has been continuously coated with zinc and aluminium to produce the excellent corrosion resistance that is commonly experienced by tanks that are exposed to the harshest of atmospheric conditions.