▎ 摘　　要

NOVELTY - Preparing micro-arc oxidation/graphene/silane composite film on aluminum alloy surface involves forming graphene oxide by modified hummers method, and then preparing graphene by hydrothermal reduction method, adding organic matter BTESPT, distilled water, ethanol in ratio of 1-5:1-5:60-100, adding 40-60mL mixed solution, acetic acid to adjust pH value of mixed solution is 3-8, magnetic stirring at 35 degrees C for 2-5 hours, and then hydrolyzing at room temperature for 24-72 hours, to obtain self-assembly liquid. USE - Method for preparing micro-arc oxidation/graphene/silane composite film on aluminum alloy surface. ADVANTAGE - The method enables to prepare micro-arc oxidation/graphene/silane composite film on aluminum alloy surface that that has simple technique and excellent corrosion resistance. DETAILED DESCRIPTION - Preparing micro-arc oxidation/graphene/silane composite film on aluminum alloy surface involves forming graphene oxide by modified hummers method, and then preparing graphene by hydrothermal reduction method, adding organic matter BTESPT, distilled water, ethanol in ratio of 1-5:1-5:60-100, adding 40-60mL mixed solution, acetic acid to adjust pH value of mixed solution is 3-8, magnetic stirring at 35 degrees C for 2-5 hours, and then hydrolyzing at room temperature for 24-72 hours, to obtain self-assembly liquid. The 30-50mg of graphene prepared is ultrasonically dispersed into self-assembly liquid prepared to obtain silane coupling agent-grafted graphene solution. The aluminum alloy substrate is ground, degreased, rinsed, micro-arc oxidized and blown dry, and used, immersed aluminum alloy substrate after treatment in silane coupling agent-grafted graphene solution prepared for 1-3 hours, and then cured reaction at 80-120 degrees C for 2-3 hours to obtain micro-arc oxidation/graphene/silane composite film on surface of aluminum alloy.