▎ 摘　　要

NOVELTY - Environment-friendly graphene oxide-modified inorganic organic passivation film includes 4-4.6 pts. wt. dodecafluoroheptyl methacrylate, 5.2-5.6 pts. wt. hexafluorobutyl methacrylate, 16-18 pts. wt. silane coupling agent KH560, 0.2-0.3 pt. wt. azobisisobutyronitrile, 90-100 pts. wt. silane coupling agent KH570, silane coupling agent KH858, 2.22.5 pts. wt. graphene oxide, 0.7-0.9 pt. wt. dimethyldiallylammonium chloride, 1.3-1.6 pts. wt. lanthanum citrate, 10-12 pts. wt. silica sol, 4.4-4.8 pts. wt. polyethylene glycol, 33-35 pts. wt. nickel nitrate and 8-11 pts. wt. zinc nitrate. USE - Environment-friendly graphene oxide-modified inorganic organic passivation film. ADVANTAGE - The method is simple and has short passivation time. The product has good salt resistance, alkali resistance and high corrosion resistance properties. DETAILED DESCRIPTION - Environment-friendly graphene oxide-modified inorganic organic passivation film comprises 4-4.6 pts. wt. dodecafluoroheptyl methacrylate, 5.2-5.6 pts. wt. hexafluorobutyl methacrylate, 16-18 pts. wt. silane coupling agent KH560, 0.2-0.3 pt. wt. azobisisobutyronitrile, 90-100 pts. wt. silane coupling agent KH570, silane coupling agent KH858, 2.22.5 pts. wt. graphene oxide, 0.7-0.9 pt. wt. dimethyldiallylammonium chloride, 1.3-1.6 pts. wt. lanthanum citrate, 10-12 pts. wt. silica sol, 4.4-4.8 pts. wt. polyethylene glycol, 33-35 pts. wt. nickel nitrate, 8-11 pts. wt. zinc nitrate, 17-19 pts. wt. phytic acid, 6-8 pts. wt. sodium gluconate, 26-28 pts. wt. water-soluble acrylic resin, ethylene glycol, anhydrous ethanol, tetrahydrofuran, sulfuric acid, nitric acid and deionized water. An INDEPENDENT CLAIM is included for preparation of environment-friendly graphene oxide-modified inorganic organic passivation film comprising: (A) adding graphene oxide to high-speed universal mill, crushing into 300-400 mesh, mixing concentrated sulfuric acid and concentrated nitric acid at volume ratio of 3:1 to obtain oxidizer solution, adding oxidized graphene powder to 4-5 times the amount of oxidizer solution, mixing at room temperature with speed of 300-400 revolutions/minute for 40-50 minutes, filtering, washing with deionized water to neutral, drying, adding dimethyl diallyl ammonium chloride to 4-5 times the amount of deionized water, stirring, adding lanthanum citrate, transferring to vacuum filter bottle, adding the dried graphene at room temperature, magnetically stirring, reacting at pressure of 0.1 MPa for 15-20 minutes, closing the vacuum pump, keeping for 5 minutes, repeating process for 2-3 times, performing centrifugal separation, taking solid, repeatedly rinsing with deionized water and drying; (B) diluting silica sol with deionized water to aqueous silica sol with silica content of 30%, adjusting pH value to 3-4, adding 2-3 times the amount of ethylene glycol, distilling at 80 degrees C under reduced pressure, controlling moisture content to 1.5-2%, adding polyethylene glycol when the temperature is 50-55 degrees C, stirring for 0.5 hour, refluxing the prepared product for 2-3 hours and cooling to room temperature; (C) adding dodecafluoroheptyl methacrylate, hexafluorobutyl methacrylate and silane coupling agent KH560 to 15-17 times the amount of tetrahydrofuran, stirring, adding azobisisobutyronitrile, stirring at speed of 300-400 revolutions/minute, heating at 65?OC for 8-10 hours and cooling to room temperature to obtain fluorine-containing silane polymer solution; (D) dissolving nickel nitrate in deionized water to prepare 30 g/L solution, adding zinc nitrate, phytic acid and sodium gluconate to obtain inorganic salt passivation solution, mixing silane coupling agent KH570 and silane coupling agent KH858 at mass ratio of 2:1, dissolving in 75% of absolute ethanol to produce 150 g/L silane solution, standing for 2-3 hours and adjusting pH value to 4-5 using dilute nitric acid solution to obtain organosilane compound passivation solution; and (E) mixing inorganic salt passivation solution with organosilane compound passivation solution, stirring, adding water-soluble acrylic resin, stirring at room temperature, adding prepared mixture, stirring for 5-6 hours, soaking galvanized sheet into the passivation solution at room temperature for 30 seconds, drying at 100-120 degrees C for 60 seconds and cooling.