고온 용융염계에서 Ni-Base 초합금의 부식거동 (Corrosion Behavior of Ni-Base Superalloys in a Hot Molten Salt)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 46권 / 9호 / 577 ~ 584페이지
· 저자명 : 조수행, 강대승, 홍순석, 허진목, 이한수

초록

The electrolytic reduction of spent oxide fuel involves the liberation of oxygen in a molten LiCl electrolyte, which
results in a chemically aggressive environment that is too corrosive for typical structural materials. So, it is essential to choose
the optimum material for the process equipment handling molten salt. In this study, corrosion behavior of Inconel 713LC,
Inconel MA 754, Nimonic 80A and Nimonic 90 in the molten salt LiCl-Li2O under an oxidizing atmosphere was investigated
at 650oC for 72~216 hrs. Inconel 713LC alloy showed the highest corrosion resistance among the examined alloys. Corrosion
products of Inconel 713LC were Cr2O3, NiCr2O4 and NiO, and those of Inconel MA 754 were Cr2O3 and Li2Ni8O10 while Cr2O3,
LiFeO2, (Cr,Ti)2O3 and Li2Ni8O10 were produced from Nimonic 80A. Also, corrosion products of Nimonic 90 were found to
be Cr2O3, (Cr,Ti)2O3, LiAlO2 and CoCr2O4. Inconel 713LC showed local corrosion behavior and Inconel MA 754, Nimonic
80A, Nimonic 90 showed uniform corrosion behavior.

영어초록

The electrolytic reduction of spent oxide fuel involves the liberation of oxygen in a molten LiCl electrolyte, which
results in a chemically aggressive environment that is too corrosive for typical structural materials. So, it is essential to choose
the optimum material for the process equipment handling molten salt. In this study, corrosion behavior of Inconel 713LC,
Inconel MA 754, Nimonic 80A and Nimonic 90 in the molten salt LiCl-Li2O under an oxidizing atmosphere was investigated
at 650oC for 72~216 hrs. Inconel 713LC alloy showed the highest corrosion resistance among the examined alloys. Corrosion
products of Inconel 713LC were Cr2O3, NiCr2O4 and NiO, and those of Inconel MA 754 were Cr2O3 and Li2Ni8O10 while Cr2O3,
LiFeO2, (Cr,Ti)2O3 and Li2Ni8O10 were produced from Nimonic 80A. Also, corrosion products of Nimonic 90 were found to
be Cr2O3, (Cr,Ti)2O3, LiAlO2 and CoCr2O4. Inconel 713LC showed local corrosion behavior and Inconel MA 754, Nimonic
80A, Nimonic 90 showed uniform corrosion behavior.

참고자료

· 없음