镍基合金受熔融氟化盐腐蚀的同步辐射XRF分析  

SR X-ray analysis of Ni-based alloys corroded in molten fluoride salt

作　　者：郑俊义[1] 余笑寒[1] 刘敏[1] 张继超[1] 王娟[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800

出　　处：《核技术》2011年第5期336-340,共5页Nuclear Techniques

基　　金：国家重点基础研究发展计划(2010CB934501);国家重大研究计划项目(2007CB936003);中国科学院院长基金特别支持项目(基于先进同步光源的裂变核能材料的前期研究;批准号:29)资助

摘　　要：采用浸入法在750℃熔融氟化盐(LiNaKF)中进行Inconel 600、Hastelloy X、Hastelloy c-276镍基高温耐蚀合金的腐蚀实验。利用同步辐射微束X射线荧光分析(μ-XRF)及X射线衍射(XRD)对样品进行了分析测试。μ-XRF结果表明,镍基合金在熔融氟化物中的腐蚀主要为合金元素Cr的流失;XRD结果表明,Hastelloy c-276合金中的钼元素在腐蚀过程中形成Mo_2C化合态,该化合态有助于提高镍基合金在熔融氟化物中的耐腐蚀性能。Corrosion test of Ni-based high temperature alloys of Inconel 600, Hastelloy X and Hastelloy c-276 were performed in molten fluoride salt （LiNaKF） at 750℃ for up to 320 h. The virgin and corroded samples were imaged by scanning electron microscope, analyzed by synchrotron radiation microbeam X-ray fluorescence （μ-XRF） and characterized by X-ray diffraction （XRD）. The μ-XRF results show that corrosion of the Ni-based alloy in molten fluoride salt is mainly due to the erosion of alloying element Cr. The XRD results show that the alloying element Mo of Hastelloy c-276 formed the Mo2C structure, which can enhances anti-corrosive performance of the alloy in molten fluoride salt.

关 键 词：X射线微束荧光分析 X射线衍射 镍基合金 熔融氟化盐 腐蚀 

分 类 号：O434.19[机械工程—光学工程]