The Effect of Water-Vapor Content and Gas Flow Rate on the Oxidation Mechanism of a 10%Cr-Ferritic Steel in Ar-H2O Mixtures
The Effect of Water-Vapor Content and Gas Flow Rate on the Oxidation Mechanism of a 10%Cr-Ferritic Steel in Ar-H2O Mixtures
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DOI：
10.1007/s11085-005-4394-1
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发表时间：
2005-06
影响因子：
2.2
通讯作者：
J. Zurek;M. Michalik;F. Schmitz;T. Kern;L. Singheiser;W. Quadakkers
中科院分区：
文献类型：
--
作者：
J. Zurek;M. Michalik;F. Schmitz;T. Kern;L. Singheiser;W. Quadakkers
研究了铁素体10%Cr钢在550 ~ 650°C的Ar-H2O混合气体中的氧化行为。研究旨在阐明水蒸气含量以及气体流速对氧化物垢形成机理的影响。研究发现，氧化物的类型和形态取决于时间和暴露条件。一个重要的观察结果是，水蒸气与钢反应产生的H2在氧化过程中起着重要作用。首先，它影响形成外部赤铁矿层的可能性，如果后者不存在，它往往会降低磁铁矿基氧化物垢的生长速率。H2影响氧化行为的程度取决于气流条件、水蒸气含量和暴露时间。
The oxidation behavior of a Ferritic 10%Cr steel in Ar-H2O mixtures was investigated at temperatures between 550 and 650°C. The studies aimed at elucidating the effect of water-vapor content as well as the gas flow rate on the mechanisms of oxide-scale formation. It was found that, the oxide types and morphologies depend on time and exposure conditions. An important observation is that H2produced by the reaction of water vapor with the steel can play a significant role in the oxidation process. First, it affects the possibility to form an external hematite layer and if the latter is not present, it tends to decrease the growth rate of the magnetite-base oxide scale. The extend by which the H2affects the oxidation behavior depends on the gas-flow conditions, the water-vapor content and the exposure time.