... curtain wall, ceiling, roofing, pillar, balcony, partition board, vehicle, exhibition booth, instrument enclosure, metro, shipping vechicle etc ... Association.2) Pretreatment of aluminum and aluminum alloy:Degrease→Alkaline etch→Roughen(pickling)→Chromizing→Baking3) ... Curing→Work piece unloading→Inspection→packing7, Aluminum Alloy guide AlloySiFeCuMnMgZnCrTiOtherRemain11000.40.550.05-0.20.05 ...