석탄-바이오매스 혼소발전 분위기에서 Fe-Cr-W 강의 고온부식 연구
Study of High Temperature Corrosion of Fe-Cr-W steel in Coal-Biomass Co-firing Power Plant Environment
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초록
Fe-9Cr-2W steels were corroded at 600-800 oC for up to 100hr in (Na2SO4-K2SO4-Fe2O3)-(CO2-0.3%SO2-6%O2) mixed gas. The poor condition samples formed thick oxide scales that consisted primarily of Fe2O3 as the major oxide and Fe3O4, FeO as the minor one through preferential oxidation of Fe. Fe-9Cr-2W steels corroded fast, forming thick and non-protective scale. The scale divided into the outer and inner layer, which consisted of the outer Fe-O layer and the inner (Fe,Cr)-O layer containing some (Fe,Cr)-S.
Abstract
Fe-9Cr-2W steels were corroded at 600-800 oC for up to 100hr in (Na2SO4-K2SO4-Fe2O3)-(CO2-0.3%SO2-6%O2) mixed gas. The poor condition samples formed thick oxide scales that consisted primarily of Fe2O3 as the major oxide and Fe3O4, FeO as the minor one through preferential oxidation of Fe. Fe-9Cr-2W steels corroded fast, forming thick and non-protective scale. The scale divided into the outer and inner layer, which consisted of the outer Fe-O layer and the inner (Fe,Cr)-O layer containing some (Fe,Cr)-S.
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