| 摘要 |
PURPOSE:To obtain a Zr base alloy having high corrosion resistance by which nodular corrosion is prevented in water at high temp. and pressure for a long period by specifying a composition contg. Sn, Fe, Ni, oxygen and other trace impurities. CONSTITUTION:This Zr base alloy contains 1.0-2.0wt% Sn, Fe, Ni, oxygen and other trace impurities. The amounts of Fe and Ni in the Zr base alloy are in the range defined by four points (0.15, 0), (0, 0.1), (0, 0.5) and (0.5, 0), preferably four points (0.25, 0), (0, 0.15), (0, 0.4) and (0.4, 0) on the plane of orthogonal coordinates with the Fe content (%) as the (x) coordinate axis and the Ni content (%) as the (y) coordinate axis. The Zr base alloy may further contain 0.1% Cr. The Zr base alloy has high corrosion resistance and is suitable for use in water at high temp. and pressure especially in a nuclear reactor.
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