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Aluminum sheet was encapsulated by inorganic-organic hybrid film through a base?catalyzed sol-gel method using organic acrylate silane resin PMBV and TEOS as precursors. FTIR?and AFM characterizations prove that PMBV and TEOS have hydrolyzed and co-condensed?with each other in the sol-gel process to form an uniform film on the surface of aluminum?sheet. XPS result shows hydroxyl groups on aluminum surface have taken part in the?co-condensation reaction.