| 摘要 |
An exhaust pipe for an internal combustion engine includes a metal tube enclosing a passage through which an exhaust gas from the internal combustion engine passes, and a ceramic film covering the metal tube from the outside, the ceramic film containing no more than about 0.5 mass % of a metallic element which is dominantly present in a surface of the metal tube. The ceramic film is an SiON film containing about 30 mass % or less of 0 and about 10 mass % or more of N.
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