Protective and anti-scaling functional gradient coating for water-cooled wall of incinerator and preparation method of protective and anti-scaling functional gradient coating

The invention discloses a protective and anti-scaling functional gradient coating for a water cooling wall of an incinerator and a preparation method of the protective and anti-scaling functional gradient coating. The gradient coating comprises a transition layer and a working layer which are connected with each other and arranged in sequence, the transition layer is supersonic electric arc spraying metal ceramic; the working layer is made of a cold-spraying thermocuring fluorine modified organic composite material, the contact angle of the coating to high-temperature medium-melting dirt is larger than 90 degrees, the good anti-scaling performance is achieved, and the total heat transfer performance of the water cooling wall can be enhanced by 0.3%-34%. According to the preparation method, the supersonic arc spraying metal ceramic serves as the transition layer, and the cold spraying thermocuring forming fluorine modified organic composite material serves as the working layer, so that functional gradient comb