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KCI등재후보 학술저널

용융염원자로 발전용 초내열 Fe계 강의 고온 부식특성 평가

Evaluation of High-Temperature Corrosion Characteristics of Super heat-resistant Fe-based steels for Molten Salt Reactor

DOI : 10.55079/jtee.2023.18.2.27
  • 23

Molten salt reactors(MSR) use (chloride, fluoride)-containing molten fluoride salts as primary coolant, at low pressure. Molten salt reactors(MSR) are high security, significantly enhanced efficiency, passive safety features, and reduction of nuclear waste, however (chloride, fluoride)-containing condition generally leads to serious corrosion damage on structural steel components. In this study, the corrosion behavior of a Fe-based steel is studied in a high temperature under (chloride, fluoride)-containing molten fluoride salts environment of approximately 500~700 ℃ for up to 200 h. After corrosion were analyzed the corrosion rate, microstructure and corrosion mechanism by scanning electron microscopy (SEM), energy Dispersive Spectrometer(EDS), X-ray diffraction (XRD). Hot corrosion test results that corrosion rates increased progressively as the corrosion temperature and time increased and the corrosion resistance of the alloy significantly enhances with the high amount of Cr and Ni. During the corrosion of the Cr, Ni-containing steels, two different oxide layers of (Fe, Cr, O)-mixed layers are sequentially formed as a layered structure and the T91 steel corroded more faster than AL-6XN steel and forming thick layer.

1. 서 론

2. 실험 방법

3. 실험 결과

4. 결 론

감사의 글

References

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