Corrosion induction-corrosion inhibition-self-repairing microcapsule as well as preparation method and coating thereof

The invention provides a corrosion induction-corrosion inhibition-self-repairing microcapsule, a preparation method thereof and a coating. Each kind of microcapsule is prepared from urea, ammonium chloride, resorcinol, a defoaming agent, an improver, an organic solvent, a formaldehyde solution and water according to a certain proportion, the improver in the microcapsule 1 is an oil-soluble acid-base indicator bromophenol blue, the improver in the microcapsule 2 is an oil-soluble corrosion inhibitor, the improver in the microcapsule 3 is an organic solvent, and the organic solvent is an organic solvent. The improver in the microcapsule 1 is an oil-soluble self-repairing agent, specifically at least one of barium petroleum sulfonate, barium dinonyl naphthalene sulfonate, benzotriazole and imidazoline, and the improver in the microcapsule 3 is an oil-soluble self-repairing agent, specifically triethoxy-1H, 1H, 2H, 2H-tridecafluoro-N-octyl silane and/or oleic acid octyl dimethyl silicone grease. The microcapsule