... curtain wall, ceiling, roofing, pillar, balcony, partition board, vehicle, exhibition booth, instrument enclosure, metro, shipping ... Architecture Manufacture Association.2) Pretreatment of aluminum and aluminum alloy:Degrease→Alkaline etch→Roughen(pickling)→Chromizing ... painting→Curing→Work piece unloading→Inspection→packing7, Aluminum Alloy guide AlloySiFeCuMnMgZnCrTiOtherRemain11000.40.550.05-0 ...