Corrosion-resistant self-repairing metal coating system and preparation method thereof

The invention belongs to the technical field of metal corrosion and protection, and particularly relates to a corrosion-resistant self-repairing metal coating system for protecting a metal matrix from external corrosion and a preparation method of the corrosion-resistant self-repairing metal coating system. The preparation method comprises the following steps: by taking nano mesoporous silica particles loaded with an inorganic corrosion inhibitor as a self-repairing material, and finally realizing co-deposition of the self-repairing material and a nickel-based coating on the surface of a metal matrix through an electrochemical method to obtain a metal coating system with corrosion resistance, wear resistance and a self-repairing function; the corrosion inhibitor anions loaded in the mesoporous silica are released, and an insoluble iron-based protective film is formed at the corrosion generation part, so that the effect of inhibiting the corrosion of a metal matrix is achieved; compared with an organic self-re