| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the generation of pinholes even if they are very small in the case metallic sprayed coating is formed on the outside face of a metallic tube by superhigh speed flame spraying. SOLUTION: In the method in which the outside face of a metallic tube is thermally sprayed with corrosion resistant alloy powder by a superhigh speed flame spraying device to form corrosion resistant metallic coating, at first, the outside face of a metallic tube is thermally sprayed by a superhigh speed flame spraying device to form corrosion resistant metallic coating, next, the feed of the corrosion resistant alloy powder to the superhigh speed flame spraying device is stopped, and the sprayed metallic coating is heated only by thermal spraying flame. |
