乏燃料贮存环境中Al-B<sub>4</sub>C复合材料的腐蚀行为研究

中国腐蚀与防护学报

2013, Vol. 33

Issue (5): 419-424

研究报告

本期目录 | 过刊浏览

乏燃料贮存环境中Al-B₄C复合材料的腐蚀行为研究

石建敏, 张玲, 陈静, 沈春雷, 雷家荣, 周晓松

中国工程物理研究院核物理与化学研究所绵阳 621900

Corrosion Behavior of Al-B₄C Composite in Spent Nuclear Fuel Storage Environments

SHI Jianmin, ZHANG Ling, CHEN Jing, SHEN Chunlei, LEI Jiarong, ZHOU Xiaosong

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 6219001, China

全文: PDF(2891 KB)

摘要: 通过实验室环境模拟沸水堆(BWR)和压水堆(PWR)乏燃料的贮存环境对不同表面处理试样开展全浸腐蚀实验。采用SEM和EDS观测腐蚀微观形貌和分析腐蚀产物，采用XRD测试腐蚀试样的物相，并通过测试试样干重得到腐蚀动力学曲线。结果表明，材料中的Al和微量元素Mg，Fe是引起腐蚀的主要因素；抛光处理试样在PWR贮存液中时，因Fe的影响出现4种微观腐蚀形貌，耐蚀性较差，而在BWR贮存液中时生成Al(OH)₃保护膜，耐蚀性较好；阳极氧化处理试样在PWR和BWR贮存液中均腐蚀增重，腐蚀产物能封闭氧化膜孔洞，抗腐蚀性能最好。

关键词 ： Al-B₄C复合材料, 中子吸收材料, 乏燃料贮存, 腐蚀, 阳极氧化

Abstract：Al-B₄C composite is a candidate material of neutron absorption for spent nuclear fuel storage racks. The corrosion behavior of Al-B₄C composite with different surface pre-treatments was examined by immersion test in solutions simulated the pressure water reactor (PWR) and boiling water reactor (BWR) spent nuclear fuel storage environments. Then the surface morphology of the corroded samples was observed by SEM, the elemental distribution and the phase constituent of corrosion products were characterized by EDS and XRD respectively. The results showed that the composite was corroded due to the preferential corrosion of Al and trace elements such as Mg and Fe. After immersion in PWR spent nuclear fuel storage solution, four different corrosion morphologies on the polished sample could be differentiated showing a poor corrosion resistance, which might be related with the Fe distribution in the composite. However, after immersion in BWR storage solution an Al(OH)₃ film formed on the polished sample surface indicating a good corrosion resistance. The pre-anodized samples exhibited mass gain after immersion test in the two storage solutions of PWR and BWR respectively, indicating the best corrosion resistance, which may be due to that the pores of the anodized film was sealed by the formed corrosion products in the solutions.

Key words： Al-B₄C composite material neutron absorption material spent nuclear fuel storage corrosion anodic oxidation

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引用本文:

石建敏, 张玲, 陈静, 沈春雷, 雷家荣, 周晓松. 乏燃料贮存环境中Al-B₄C复合材料的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2013, 33(5): 419-424.
SHI Jianmin, ZHANG Ling, CHEN Jing, SHEN Chunlei, LEI Jiarong, ZHOU Xiaosong. Corrosion Behavior of Al-B₄C Composite in Spent Nuclear Fuel Storage Environments. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 419-424.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I5/419

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