| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot dip galvanized steel pipe which has excellent corrosion resistance. SOLUTION: The hot dip galvanized steel pipe is obtained by using a plated steel pipe subjected to galvannealing having a composition containing, by weight, 0.05 to 10% Mg and 4 to 22% Al, and the balance Zn with inevitable impurities. The galvannealing can contain 0.002 to 0.1% Ti and 0.0005 to 0.045% B as well, and, if required, can further contain 0.005 to 2.0% of at least one kind of an easily oxidizable element selected from rare earth elements, Y, Zr and Si. The alloy is suitable for housing, piping, construction, agriculture, fishing, roads, automobiles, two-wheeled vehicles, or the like.
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