新锆合金在两种不同介质中的耐蚀行为  

Corrosion Resistance of New Zirconium Alloys in Different Media

作　　者：李中奎[1] 刘建章[1] 李佩志[1] 周廉[1] 宋启忠[1] 

机构地区：[1]西北有色金属研究院

出　　处：《稀有金属材料与工程》1999年第2期101-104,共4页Rare Metal Materials and Engineering

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。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.

关 键 词：耐蚀行为 腐蚀介质 锆合金 核反应堆 结构材料 

分 类 号：TL341[核科学技术—核技术及应用] TG146.414[一般工业技术—材料科学与工程]