▎ 摘　　要

NOVELTY - Preparation of graphene composite anti-corrosive coating includes preparing organic coating solution with hydroxyl or amino group of organic polymer; preparing graphene oxide or modified graphene solution; polishing metal surface using metallographic sandpaper, successively polishing with ethanol, acetone, anhydrous ethanol, deionized water and oil, and cleaning; taking saturated calomel electrode as reference electrode, molybdenum electrode as counter electrode and pretreated metal as working electrode, performing electrodeposition, adding organic coating solution, drying, and curing. USE - Method for preparing graphene composite anti-corrosive coating (claimed). ADVANTAGE - The coating is environment-friendly, non-toxic, uniform, more compact and more lasting to metal substrate, and has controllable film layer thickness and stable protective effect. DETAILED DESCRIPTION - Preparation of graphene composite anti-corrosive coating comprises preparing organic coating solution with hydroxyl or amino group of organic polymer; preparing graphene oxide or modified graphene solution; polishing metal surface using metallographic sandpaper, successively polishing with ethanol, acetone, anhydrous ethanol, deionized water and oil, and cleaning; taking saturated calomel electrode as reference electrode, molybdenum electrode as counter electrode and pretreated metal as working electrode, performing electrodeposition at 30-55 degrees C, 0.05-20 Hz, base potential of - 0.55 to - 0.30V and potential deposition of - 1.15 to - 0.70 V, adding organic coating solution for 100-300 seconds, drying, and curing; adding treated metal in graphene oxide or modified graphene solution, taking saturated calomel electrode as reference electrode, molybdenum electrode as counter electrode and pretreated metal as working electrode, performing electrodeposition at 30-55 degrees C, 0.05-20 Hz, base potential of - 0.55 to - 0.30V and potential deposition of - 1.15 to - 0.70 V, adding graphene oxide or graphene modified film forming solution for 100-300 seconds, drying, and curing; placing metal in prepared organic coating solution, taking saturated calomel electrode as reference electrode, molybdenum electrode as counter electrode and pretreated metal as working electrode, performing electrodeposition at 30-55 degrees C, 0.05-20 Hz, base potential of - 0.55 to - 0.30V and potential deposition of - 1.15 to - 0.70 V, adding organic coating solution in film-forming solution for 100-300 seconds, drying, and curing. INDEPENDENT CLAIMS are included for: (1) preparation of organic coating solution comprising mixing bis-(3-(triethoxysilyl)silylpropyl)tetrasulfide, deionized water and ethanol at volume ratio of 4:6:90, adding glacial acetic acid, and adjusting pH to 3-6; and (2) preparation of graphene oxide or modified graphene solution comprising dissolving graphene oxide or graphene in deionized water to obtain concentration of 0.5-1.5 mg/ml graphene oxide or modified graphene solution.