晶界工程对Incoloy 800H合金在850℃ FLiNaK熔盐中腐蚀行为的影响
Effects of Grain Boundary Engineering on the Corrosion Performance of Incoloy 800H in FLiNaK Melted at 850℃
摘 要
为了评价晶界工程（GBE）对800H合金在850℃ FLiNaK熔盐中腐蚀行为的影响，对GBE 800H和800H合金分别在850℃ FLiNaK中进行了100 h静态腐蚀试验。应用扫描电子显微镜/能谱仪（SEM/EDS）、聚焦离子束/扫描电镜/能谱仪（FIB/SEM/EDS）、高精度天平测量了质量变化和微区成分变化，观察了腐蚀形貌，并分析了腐蚀机制和过程。结果表明：FLiNaK熔盐主要沿晶界向基体渗透；GBE 800H合金的腐蚀深度和FLiNaK沿晶界的渗透深度都小于800H合金的。
氟锂钠钾熔盐
晶界工程
腐蚀行为
800H alloy
FLiNaK molten salt
grain boundary engineering
corrosion performance
Abstract
To evaluate the effects of grain boundary engineering (GBE) on the corrosion performance of Incoloy 800H in FLiNaK melted at 850℃, GBE 800H alloy and 800H alloy were tested in static molten FLiNaK at 850℃ for 100 hours, respectively. SEM/EDS, FIB/SEM/EDS and electro-reading balance were used to measure the weight loss and micro-area element changes and observe corrosive morphology. The corrosion mechanism and process were analyzed. The results show that FLiNaK remarkably penetrated through grain boundaries; the corrosion depth and FLiNaK penetration through the grain boundaries of GBE 800H alloy are smaller than those of 800H alloy.
中图分类号 TL172 DOI 10.11973/fsyfh-201801006
所属栏目 试验研究
基金项目
收稿日期 2016/7/10
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联系人作者聂书红(nsh968@sina.com)
引用该论文: NIE Shuhong,LIANG Zhengqiang. Effects of Grain Boundary Engineering on the Corrosion Performance of Incoloy 800H in FLiNaK Melted at 850℃[J]. Corrosion & Protection, 2018, 39(1): 29
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