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22Cr-12Ni-5W 슈퍼 오스테나이트계 스테인레스강의 고온산화 및 내식성에 미치는 결정립 크기의 영향
이승대(S. D. Lee),이종문(J. M. Lee),강창룡(C. Y. Kang),김재환(J. H. Kim),이도훈(D. H. Lee) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The effect of grain size on corrosion resistance and high temperature oxidation behavior of 22Cr-12Ni-5W super austenitic stainless steels for desulfurization equipment in a heat power station are considered in this paper. The high temperature oxidation resistance at 600℃~800℃ was excellent from all specimens and specimen of the smallest grain size was the most excellent. Because increasing of diffusion course through the grain-boundly was promoted nucleation and growth of Cr₂O₃ film. In the result of anodic polarization test in the 0.5M H₂SO₄ solution, the typical passive state curves was showed from all specimens. Corrosion resistance of the specimen which has the largest grain size was most excellent.