| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5440058 | Corrosion Science | 2016 | 8 Pages |
Abstract
The oxidation behaviour of a ferritic-martensitic steel exposed to deaerated supercritical water at 560-650 °C and 25 MPa was investigated. A double-layered oxide formed on all samples, consisting of an Fe-rich outer magnetite layer and a Cr-rich inner oxide layer. The temperature had a strong influence on the oxidation rate and morphology of the oxide films. The oxidation kinetics showed nearly parabolic behaviour. The calculated activation energy indicated that the oxidation rate-controlling step was the outward diffusion of Fe2+ and Fe3+ ions through the spinel lattice. The mechanism behind the temperature dependence of the oxidation is further discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Zhongliang Zhu, Hong Xu, Dongfang Jiang, Xueping Mao, Naiqiang Zhang,