▎ 摘　　要

NOVELTY - Long-acting self-repairing intelligent protective coating is composed of 3.1-5.2 wt.% graphene, 2.1-4.3 wt.% iron oxide powder, 2.5-6.8 wt.% copper oxide powder, 1.6-2.5 wt.% fumed silica, 1.6-3.9 wt.% silicon carbide powder, 0.3-1.4 wt.% coupling agent, 0.3-2.1 wt.% active diluent, 0-2.1 wt.% pigment, 0-0.8 wt.% styrene-acrylic emulsion, 1.3-2.1 wt.% corrosion inhibitor, 0.3-1.5 wt.% adhesion promoter, 1.1-2.3 wt.% film forming additive, 0.5-1.15 wt.% defoamer, 3.2-9.5 wt.% polyamide, 1.1-2.1 wt.% leveling agent, 0.3-1.45 wt.% emulsifier, 8.1-11.4 wt.% modified epoxy resin, and remaining organic solvent. USE - As long-acting self-repairing intelligent protective coating. ADVANTAGE - As compared with the traditional process, the coating greatly improves the structural strength of the anti-corrosion coating, and can effectively resist the damage to the coating layer caused by the impact of external force and the resistance to the external oxidative environment. Simultaneously, the damaged components of the coating layer caused by external impact can be elastically repaired through the elastic deformation ability of the coating, and greatly improving the protective performance of the coating. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a preparation method of the protective coating, involving (a) solvent initial mixing by firstly adding organic solvent, defoamer, pigment, film-forming additive, and coupling agent to the preparation device, in the environment of 1.3-2.5 times the standard atmospheric pressure, evenly stirring at a constant temperature of 80-120degrees Celsius for 10-30 minutes, and keeping the uniformly stirred mixed solution under heat preservation and pressure to obtain an organic mixed solution, (b) mixing solid materials by mixing graphene, iron oxide powder, copper oxide powder, and silicon carbide powder to obtain a solid mixture, adding reactive diluent, polyamide, styrene-acrylic emulsion, and modified epoxy resin to the solid mixture and evenly stirring with ultrasonic waves, and while stirring, synchronously and uniformly cooling the organic mixed liquid prepared in step (a) to 40-80degrees Celsius, where the temperature of the organic mixed liquid is 10-20degrees Celsius higher than that of the solid-liquid mixture, and (c) material mixing by adding the solid-liquid mixture prepared in step (b) together with corrosion inhibitor, adhesion promoter, leveling agent, emulsifier and fumed silica into the cooled organic mixed liquid, firstly ultrasonically stirring the mixture for 10-20 minutes, then applying pressure to the mixture, so that the pressure of the mixture is 1.5-3.6 kg/cm2, while keeping the pressure constant, ultrasonically homogenizing the mixture, while performing the ultrasonic homogenization, passing a direct current (DC) current into the mixture, where the flow direction of the DC current is perpendicular to the direction of the pressure force, after 10-15 minutes of ultrasonic homogenization, allowing the mixture to stand under constant pressure and current and naturally cooling to normal temperature, unloading the pressure and disconnecting the mixture from the external corona circuit, and obtaining the finished coating and storing in a tubular form without oxygen; and (2) a preparation device of the coating, comprising a carrying frame, a reaction kettle, a conveying material pipe, a control valve, a supply pump, a booster pump, an inert gas storage tank and a drive circuit, where the bearing frame is a groove-shaped structure with an axial cross-section in the shape of "open box", and two reaction kettles are embedded in the bearing frame and are slidably connected with the inner side of the bearing frame through slide rails, and is connected with the bottom of the bearing frame through the bearing column, and the two reaction kettles are symmetrically distributed on both sides of the axis of the bearing frame, where the upper end face of the reaction kettle is provided with a feeding port and an exhaust port, and the lower end face is provided with a material discharge port, and the discharge ports of the two reaction kettles are communicated through a conveying material pipe, where the conveying material pipe and the material discharging port are communicated with the feeding pump, where the booster pump is communicated with the conveying pipe and the discharge port through a control valve, and the conveying material pipe and the supply pump are all connected with the bottom of the bearing frame, and the exhaust port is communicated with the booster pump through a three-way valve, where the booster pump is communicated with an inert gas storage tank through a guide pipe, and at least one of the inert gas storage tanks is connected to the outer side of the bearing frame, and where the drive circuit is connected with the outer side of the bearing frame, and is electrically connected with the reaction kettle, the control valve, the supply pump, the booster pump and the three-way valve respectively.