FORMATION OF SURFACE FILM

PURPOSE:To easily form a film having excellent corrosion resistance, etc., by disposing a heat resistant frame around the part of a base material to be formed with the film, packing the powder, etc., of a self-fluxing alloy and resin between the base material and the frame and heating the same to sinter the powder, then removing the frame and heating the powder, etc., in the sintered state to melt. CONSTITUTION:The frame 2 made of ceramics or metal, etc., is provided around the part of the base material 1 such as roll, sheet or pipe to be formed with the film by providing a spacing larger than the thickness of the film to be formed therebetween. The powder or sheet 4 of the self-fluxing metal (e.g.; Ni-base alloy) or resin is closely packed between the base material 1 and the frame 2. The base material 1 is then heated from the inside or outside surface or both the inside and outside surfaces thereof by a high-frequency induction heating coil 3, etc., to put the packed powder 4, etc., into the sintered state 5. After the frame 2 is removed, the powder or the like 5 made into the sintered state is heated until a molten state 6 is attained, by which the film of the different metal layer or resin layer is formed on the surface of the base material 1.