▎ 摘　　要

NOVELTY - Preparing graphene-containing micro-arc oxidation corrosion-resistant ceramic layer comprises e.g. sanding the surface of the substrate with sandpaper, cleaning surface of the substrate using absolute ethanol and deionized water, configuring silicate system electrolyte using deionized water, allowing to stand for 12 hours to obtain a micro-arc oxidation electrolyte, adding graphene fragments to organic solvent, ultrasonically dispersing for 2-3 hours, adding nitrate, ultrasonically dispersing 0.5-1 hour to get electrophoretic deposition electrolyte, placing substrate into the micro-arc oxidation electrolyte, providing pre-treated substrate as the anode, providing micro-arc oxidation electrolytic cell as the cathode, placing in the environment of a constant temperature water bath at 20 degrees C, providing alternating current with frequency of 50-500 Hz, and maintaining alternating pulse voltage of 400-700 V. USE - The method is useful for preparing graphene-containing micro-arc oxidation corrosion-resistant ceramic layer. DETAILED DESCRIPTION - Preparing graphene-containing micro-arc oxidation corrosion-resistant ceramic layer comprises (1) sanding the surface of the substrate with sandpaper, and cleaning surface of the substrate using absolute ethanol and deionized water, (2) configuring silicate system electrolyte using deionized water, and allowing to stand for 12 hours to obtain a micro-arc oxidation electrolyte, (3) adding graphene fragments to organic solvent, ultrasonically dispersing for 2-3 hours, adding nitrate, and ultrasonically dispersing 0.5-1 hour to get electrophoretic deposition electrolyte, (4) placing substrate into the micro-arc oxidation electrolyte, providing pre-treated substrate as the anode, providing micro-arc oxidation electrolytic cell as the cathode, placing in the environment of a constant temperature water bath at 20 degrees C, providing alternating current with frequency of 50-500 Hz, maintaining alternating pulse voltage of 400-700 V, under the condition of positive and negative voltage ratio of 5:1, subjecting substrate to micro-arc oxidation in the micro-arc oxidation electrolyte for 5-10 minutes, washing the prepared first sample with deionized water, providing DC power supply of 80-120 V, carbon plate as the anode, and first sample as the cathode, maintaining room temperature, placing the first sample in the electrophoretic deposition electrolyte configured in step (3) for electrophoretic deposition for 3-7 minutes , washing the prepared second sample with deionized water, placing second sample into the micro-arc oxidation electrolyte, performing micro-arc oxidation under the micro-arc oxidation conditions for 1-10 minutes, removing out the second sample, washing with deionized water, and immersing in deionized water for 8 hours, and air drying.