Metal-ceramic composite lining steel pipe structure and preparation method thereof

The invention provides a metal-ceramic composite lining steel pipe structure and a preparation method thereof. The metal-ceramic composite lining steel pipe structure comprises a steel pipe layer, a metal middle layer and a ceramic layer. The steel pipe layer is the outermost layer, and the ceramic layer is the innermost layer; the metal intermediate layer mainly comprises an iron matrix and an additive metal with potential lower than that of an iron electrode, and the additive metal forms a compound with iron, or dissociates in the iron matrix to form a micro cathode, or forms a solid solution with the iron matrix; the metal middle layer completely covers the inner wall of the steel pipe layer, the metal middle layer is tightly attached to the steel pipe layer, and metallurgical bonding is locally formed; and the ceramic layer is mechanically combined with the metal middle layer. Additive metal with the potential lower than that of an iron electrode is added into the metal middle layer, liquid preferentially