【摘要】 研究了几种ＺｒＳｎＮｂＦｅＣｒ新锆合金在４００℃，１０．３ＭＰａ及在３６０℃，１８．６ＭＰａ含７×１０－５锂的氢氧化锂水中的耐蚀行为；用ＴＥＭ和ＳＥＭ对合金中的第二相的结构和组分进行了分析。研究结果表明：添加少量Ｎｂ（０．２ｗ％）的该类合金具有最好的综合耐蚀性能；低Ｆｅ／Ｃｒ比的高Ｎｂ（１．０ｗ％）合金耐蚀性能均较差；而高Ｆｅ／Ｃｒ比的高Ｎｂ合金在４００℃蒸汽中具有较好的耐蚀性能，但在氢氧化锂水中则较差。对产生这些差异的原因从第二相结构、组分等角度进行了分析。更多还原

【Abstract】 The corrosion resistances of some ZrSnNbFeCr alloys have been investigated at 400℃/10 3 MPa steam and 360℃/18 6 MPa lithium hydroxide solution with 7×10 -5 Li, respectively. The structure and composition of the second phases in the alloys were determined using TEM and EDAX. The results show that the alloy with low Nb content (0 2 wt%)has superior corrosion resistance in both media. The alloy with high Nb content(1 0wt%) and low Fe/Cr ratio has worse corrosion resistance in both media. The alloy with high Nb content and high Fe/Cr ratio has better corrosion resistance in steam and worse corrosion resistance in lithium hydroxide solution. The different performances of the alloy with low Nb content and low Fe/Cr ratio in various media result from the structures and compositions of the second phases.更多还原