Oxidation of Fe-10Cr in O2 and in O2+H2O environment at 600 °C: A microstructural investigation

被引:51
|
作者
Jonsson, T. [1 ]
Pujilaksono, B. [1 ]
Heidari, H. [2 ]
Liu, F. [2 ]
Svensson, J. -E. [1 ]
Halvarsson, M. [2 ]
Johansson, L-G. [1 ]
机构
[1] Chalmers, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden
[2] Chalmers, Dept Appl Phys, SE-41296 Gothenburg, Sweden
关键词
Stainless steel; TEM; STEM; High temperature corrosion; Internal oxidation; HIGH-TEMPERATURE OXIDATION; IRON-CHROMIUM ALLOYS; WATER-VAPOR; FECR-ALLOYS; FLOW-RATE; 600-DEGREES-C; SCALE; EVAPORATION; KINETICS; OXYGEN;
D O I
10.1016/j.corsci.2013.06.016
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Oxidation of Fe-10Cr in dry and wet O-2 was studied at 600 degrees C for up to 168 h. Oxide microstructure was investigated by STEM/EDX, FIB/SEM and TEM. Oxidation in dry O-2 gives a Cr-rich protective (Fe1-xCrx)(2)O-3 scale. The same protective oxide initially forms in O-2 + H2O environment, but after an incubation period scale breakdown is triggered by CrO2(OH)(2) evaporation that depletes the substrate in Cr and converts (Fe1-xCrx)(2)O-3 to FeCr spinel oxide. Internal oxidation occurs after breakaway. Alternating external and internal oxidation result in the inward-growing scale showing a characteristic banded morphology. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:326 / 336
页数:11
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