The building curtain wall is widely used as a decorative wall formodern large and high-rise buildings. It is composed by the main structure ofthe supporting structure and the panel and it has certain displacement abilityto relative main structure. Aluminum alloy profile is largely used in thecurtain wall structure (up to more than 95%). Because of itshigh strength, light weight, strong stability, strong corrosion resistance, goodplasticity, deformation of small, non-polluting, non-toxic and fire-resistantfeatures, so it has a long service life (up to 50-100 years). Therefore, the selectionsof aluminum alloy profiles, surface treatment, cross-section design, and mechanicalprocessing all play an important role in the performance of the curtain wall.

The surface treatment methods of aluminum curtain wall have anodizing,electrophoresis paint, powder coating, fluorocarbon spraying, etc. For theanodizing aluminum curtain wall, it should meet the standard of GB /T 5237. 2-2000. The local film thickness ≥ 12μm, the average filmthickness ≥ 15μm.