Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能

doi:10.3969/j.issn.1007-2861.2014.05.011

上海大学学报(自然科学版) ›› 2015, Vol. 21 ›› Issue (2): 160-169.doi: 10.3969/j.issn.1007-2861.2014.05.011

Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能

高长源1,2, 姚美意1,2, 徐启迪1,2, 黄娇1,2, 张金龙1,2, 周邦新1,2

(1. 上海大学微结构重点实验室, 上海200444; 2. 上海大学材料研究所, 上海200072)

收稿日期:2015-01-15 出版日期:2015-04-29 发布日期:2015-04-29
通讯作者: 姚美意(1973—), 女, 研究员, 博士生导师, 博士, 研究方向为核反应堆包壳材料. E-mail:yaomeiyi@shu.edu.cn
基金资助:
国家自然科学基金资助项目(51171102)

Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C

GAO Chang-yuan1,2, YAO Mei-yi1,2, XU Qi-di1,2,HUANG Jiao1,2, ZHANG Jin-long1,2, ZHOU Bang-xin1,2

(1. Laboratory for Microstructures, Shanghai University, Shanghai 200444, China; 2. Institute of Materials, Shanghai University, Shanghai 200072, China)

Received:2015-01-15 Online:2015-04-29 Published:2015-04-29

摘要/Abstract

摘要： 通过高压釜腐蚀实验研究了添加微量S对Zr-0.70Sn-0.35Nb-0.30Fe (质量分数, %)合金在360 C/18.6 MPa/0.01 mol/L LiOH 水溶液中耐腐蚀性能的影响. 利用透射电子显微镜(transmission electron microscope, TEM)和扫描电子显微镜(scanning electron microscope, SEM)观察和分析了合金及腐蚀后氧化膜的显微组织. 结果表明: 在Zr-0.70Sn-0.35Nb-0.30Fe合金中添加5570 μg/g的S后, 合金的耐腐蚀性能下降, 且随着S含量的增加恶化趋势显著.S 的表面偏聚、尺寸较大的Zr₉S₂和Zr₃Fe 第二相的析出, 加速了氧化膜中缺陷扩散凝聚形成孔隙和微裂纹的演化过程, 导致Zr-0.70Sn-0.35Nb-0.30Fe-xS 合金的耐腐蚀性能较差

关键词: 锆合金, 硫, 耐腐蚀性能, 显微组织

Abstract: The effect of adding dilute S on the corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe alloy was investigated in lithiated water with 0.01 mol/L LiOH at 360 C/18.6 MPa by autoclave tests. The microstructures of the alloys and the oxide layers formed on the alloys were investigated by transmission electron microscope (TEM) and scanning electron microscope (SEM). Results showed that adding 5570 μg/g S degraded the corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe alloy and the higher the S content was, the worse corrosion resistance was. Surface segregation of S and the precipitation of coarse Zr₉S₂ and Zr₃Fe second phase particles accelerated the evolution of pores and micro-cracks formed by diffusion of defects in oxide layer, which leads to the bad corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-S alloy.

Key words: corrosion resistance, microstructure, sulphur, zirconium alloy

中图分类号:

TL 341

高长源1,2, 姚美意1,2, 徐启迪1,2, 黄娇1,2, 张金龙1,2, 周邦新1,2. Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能[J]. 上海大学学报(自然科学版), 2015, 21(2): 160-169.

GAO Chang-yuan1,2, YAO Mei-yi1,2, XU Qi-di1,2,HUANG Jiao1,2, ZHANG Jin-long1,2, ZHOU Bang-xin1,2. Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(2): 160-169.

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Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能

Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C

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Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能

Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C

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Zr-0.70Sn-0.35Nb-0.30Fe-xS合金在360 C LiOH水溶液中的耐腐蚀性能

Corrosion resistance of Zr-0.70Sn-0.35Nb-0.30Fe-xS alloy in lithiated water at 360 C