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℃

作　　者：聂书红[1] 梁政强[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《腐蚀与防护》2018年第1期29-34,共6页Corrosion & Protection

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100h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。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.

关 键 词：800H合金 氟锂钠钾熔盐 晶界工程 腐蚀行为 

分 类 号：TL172[核科学技术—核能科学]