Analysis of Water Vapor Oxidation of Fe and Fe–Cr Alloys by Measuring the Partial Pressures of Hydrogen and Oxygen
Analysis of Water Vapor Oxidation of Fe and Fe–Cr Alloys by Measuring the Partial Pressures of Hydrogen and Oxygen
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DOI：
10.1007/s11085-017-9735-3
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发表时间：
2017-01
影响因子：
2.2
通讯作者：
M. Fukumoto;H. Sonobe;M. Hara;H. Kaneko
中科院分区：
文献类型：
--
作者：
M. Fukumoto;H. Sonobe;M. Hara;H. Kaneko
利用安装在实验反应器出口处的氧传感器和氢传感器研究了Fe、Fe-15mass%Cr和Fe-30mass%Cr合金在1173 K下Ar-H2O和Ar-O2-H2O气氛中的氧化行为。在Ar-H2O中，使用氢传感器连续测量氢分压的变化，并且计算产生的氢和由此消耗的氧的量。计算的总质量增加与实验后通过重量分析获得的结果非常一致。在Ar-O2-H2O中，从使用氧传感器测量的氧分压的变化计算从大气中的环境氧气消耗的氧量。在这种情况下，总质量增加被分析为从环境氧气消耗的氧气量和从蒸汽溶解供应的氧气量的总和。氧化模式分为三种：（1）水蒸气氧化（Ar-H_2O），（2）水蒸气氧化和氧氧化（Ar-500 ppmO_2-H_2O，Fe-30 Cr除外），（3）氧氧化（Ar-1%O_2-H_2O）。结果表明，使用氢和氧传感器的组合的气体监测方法是有用的，用于调查在含有水蒸气和氧气的气氛中的水蒸气氧化。
The oxidation behaviors of the Fe, Fe–15mass%Cr and Fe–30mass%Cr alloys were investigated at 1173 K in Ar–H2O and Ar–O2–H2O atmospheres using an oxygen sensor and a hydrogen sensor installed at the outlet of an experimental reactor. In Ar–H2O, the changes in the hydrogen partial pressure were continuously measured using the hydrogen sensor, and the amounts of generated hydrogen and resultant consumed oxygen were calculated. The calculated gross mass gain was in close agreement with that gravimetrically obtained after the experiment. In Ar–O2–H2O, the amount of oxygen consumed from the ambient oxygen gas in the atmosphere was calculated from the change in the oxygen partial pressure measured using the oxygen sensor. In this case, the gross mass gain was analyzed as the sum of the amount of oxygen consumed from the ambient oxygen and that supplied from the steam dissolution. The oxidation patterns were classified into three types: (1) water vapor oxidation (in Ar–H2O), (2) water vapor oxidation and oxygen oxidation (in Ar–500 ppmO2–H2O except for Fe–30Cr), and (3) oxygen oxidation (in Ar–1%O2–H2O). It was demonstrated that a gas monitoring method using a combination of hydrogen and oxygen sensors is useful for investigating the water vapor oxidation in an atmosphere containing water vapor and oxygen.