PURPOSE: To stick a self-fluxing alloy uniformly on the inner face of a pipe and to give corrosion resistance and wear resistance, by sealing the powder of the self-fluxing alloy in a pipelike steel material, diffusing it uniformly by rotating the pipe while sucking by vacuum and heating it from the outside.

CONSTITUTION: A shaft for power transmission 4 and an end plate 3 for closing are attached to an end of a cylinder blank material 1 by welding. The shaft 4 is attached to a rotating jig so that the material 1 becomes parallel to the axial direction, and the powder of the self-fluxing alloy is distributed uniformly over the longitudinal direction of the material 1 from the tip 6' of a trumpet-shaped container 6. Open end of the material 1 is closed by welding 5' a mild steel plate 8, and a pipe 8 that communicates with the inside of the material 1 is welded at the center of the mild steel plate 8, and connected to a vauum pump 11 through a valve 10 and a rotary joint 12. The material 1 is sucked by vacuum while rotating it, and heated from the outer periphery while maintaining specified pressure. The self-fluxing alloy is heated to become uniform melting temperature and stuck fastly and uniformly.