| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel pipe having a surface plated so as to have further improved corrosion resistance, and to provide a manufacturing method therefor. SOLUTION: The method for manufacturing the steel pipe superior in corrosion resistance comprises: the first step of preheating a steel pipe shaped in a pipe production process; the second step of providing a reductive atmosphere while keeping a temperature of the preheated steel pipe at a predetermined temperature or higher; the third step of melting an alloy containing 55 mass% aluminum and 43.4 to 44.9 mass% zinc, and plating the surface of the steel pipe with the melted alloy; the fourth step of cooling the steel pipe; and the fifth step of coating the surface of the steel pipe with a resin. COPYRIGHT: (C)2007,JPO&INPIT
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