中国腐蚀与防护学报
中國腐蝕與防護學報
중국부식여방호학보
JOURNAL OF CHINESE SOCIETY FOR CORROSION AND PROTECTION
2009年
5期
349-352
,共4页
SA213T91钢%水蒸汽含量%氧化
SA213T91鋼%水蒸汽含量%氧化
SA213T91강%수증기함량%양화
T91 steel%steam content%oxidation
研究了ASME213 T91钢(T91钢)650℃下在(Ar+H_2O)气氛中不同含量的水蒸汽中的高温氧化行为.T91钢在5%、7%和10%Ar+H_2O气氛中氧化10 h的氧化动力学曲线表明,在含5%H_2O气氛中氧化时,动力学符合抛物线规律,在其余两种浓度下氧化遵从分阶段抛物线规律.随水蒸汽含量的增大,氧化速度明显增大.在T91钢表面形成了多层结构的氧化膜.氧化膜组成从外到内依次为Fe_2O_3,Fe_3O_4和(Fe,Cr)_3O_4.探讨了不同含量的水蒸汽对T91钢氧化行为的影响机理
研究瞭ASME213 T91鋼(T91鋼)650℃下在(Ar+H_2O)氣氛中不同含量的水蒸汽中的高溫氧化行為.T91鋼在5%、7%和10%Ar+H_2O氣氛中氧化10 h的氧化動力學麯線錶明,在含5%H_2O氣氛中氧化時,動力學符閤拋物線規律,在其餘兩種濃度下氧化遵從分階段拋物線規律.隨水蒸汽含量的增大,氧化速度明顯增大.在T91鋼錶麵形成瞭多層結構的氧化膜.氧化膜組成從外到內依次為Fe_2O_3,Fe_3O_4和(Fe,Cr)_3O_4.探討瞭不同含量的水蒸汽對T91鋼氧化行為的影響機理
연구료ASME213 T91강(T91강)650℃하재(Ar+H_2O)기분중불동함량적수증기중적고온양화행위.T91강재5%、7%화10%Ar+H_2O기분중양화10 h적양화동역학곡선표명,재함5%H_2O기분중양화시,동역학부합포물선규률,재기여량충농도하양화준종분계단포물선규률.수수증기함량적증대,양화속도명현증대.재T91강표면형성료다층결구적양화막.양화막조성종외도내의차위Fe_2O_3,Fe_3O_4화(Fe,Cr)_3O_4.탐토료불동함량적수증기대T91강양화행위적영향궤리
The steam oxidation of T91 steel exposed to the Ar+H_20 mixed atmosphere at 650 ℃ was investigated. The formed scales were successively composed of Fe_2O_3, Fe_3O_4 and (Fe,Cr)_3O_4 from the outer surface. The steam oxidation kinetics of T91 steel followed the parabolic law at the atmosphere with 5% steam and partially followed the parabolic law at the atmosphere with 7% and 10% steam. Increasing the steam content remarkably accelerated the steam oxidation rate of T91 steel. It was observed that the multilayer oxidation scales formed on the surface of T91 steel after exposed to the mixed atmosphere with 5%, 7% and 10% steam (vol.%) for 10 h. The effect of the steam contents in the mixed atmosphere on the oxidation mechanism of T91 steel was discussed.
