LiCl-Li2O 용융염에서 초내열합금의 부식거동
Corrosion Behavior of Super-Heat-Resistant Alloys in LiCl-Li2O Molten Salt Atmosphere
- 한국산업기술융합학회(구. 산업기술교육훈련학회)
- 산업기술연구논문지
- 산업기술연구논문지 제25권 2호
- : KCI등재후보
- 2020.06
- 33 - 40 (8 pages)
In this research, the corrosion behavior of super-heat-resistant alloy was studied for developing a reactor vessel material for metal conversion of spent nuclear fuel via lithium molten salt electrolysis. The experimental results are summarized as follows: (1) The oxide formation during corrosion reaction was at the rate of diffusion of alloying elements with the thermodynamic stability according to the oxide formation, and initially formed Fe, Cr-oxide. As the corrosion progressed, Fe, Ni-rich oxide, and Ni-based spinel oxides emerged. (2) The corrosion rate of super-heat-resistant alloys follows the parabolic law for reaction time and linear law for the concentration of Li2O. (3) Al and Ti, which are oxygen-active elements, are useful for improving corrosion resistance; at Al and Ti contents of approximately 1.5% and 2.5% respectively, these alloying elements are the first to be oxidized through external diffusion to form oxides. This may also inhibit internal oxidation through formation of a layer on the oxide/base metal interface. Although Mo and Nb tended to be concentrated at the oxide/oxide interface, a clear improvement in corrosion resistance to internal oxidation could not be observed.
Ⅰ. 서 론
Ⅱ. 실험방법
Ⅲ. 결과 및 고찰
Ⅳ. 결론
참고문헌