Corrosion and carburization behavior of chromia-forming heat resistant alloys in a high-temperature supercritical-carbon dioxide environment

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Corrosion and carburization behavior of chromia-forming heat resistant alloys in high-temperature supercritical-CO2 were investigated. For all alloys, a thin and continuous chromia (Cr2O3) layer was formed on the surface, while the existence of an amorphous carbon layer was identified at the chromia/matrix interface. Below the amorphous C layer, Cr-rich M23C6 carbides were extensively formed in Alloy 800HT but not in Alloy 600 or Alloy 690. The carburization resistance was dependent on whether the matrix is Fe-based or Ni-based. The existence of the carburized region with Cr-rich M23C6 carbides in Alloy 800HT contributed to additional loss of ductility.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2015-10
Language
English
Article Type
Article
Citation

CORROSION SCIENCE, v.99, pp.227 - 239

ISSN
0010-938X
DOI
10.1016/j.corsci.2015.07.007
URI
http://hdl.handle.net/10203/205261
Appears in Collection
NE-Journal Papers(저널논문)
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