Effects of Fe on Oxidation of Ni-20Cr and Ni-30Cr Alloys at 800 °C in Wet CO2 Gas

The oxidation behaviour of model alloys Ni-(20, 30)Cr (wt.%) with (0, 1, 5, 15%) Fe was investigated at 800 °C in Ar-20%CO 2 -20%H 2 O gas. All 20Cr alloys developed a multilayered scale, and the outer scale layers on alloys containing iron were subject to spallation. However, all 30Cr alloys develo...

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Published inHigh temperature corrosion of materials Vol. 94; no. 3-4; pp. 219 - 233
Main Authors Xie, Yun, Zhang, Jianqiang, Young, David J.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2020
Springer Nature B.V
Subjects
Alloy development
Alloying effects
Carbon dioxide
Chemistry and Materials Science
Chromium oxides
Corrosion and Coatings
Inorganic Chemistry
Iron
Materials Science
Metallic Materials
Nickel chromium alloys
Original Paper
Oxidation
Scale (corrosion)
Spallation
Transport properties
Tribology
Water vapor
Water vapour
Alloy
Internal oxidation
High temperature oxidation
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Summary:The oxidation behaviour of model alloys Ni-(20, 30)Cr (wt.%) with (0, 1, 5, 15%) Fe was investigated at 800 °C in Ar-20%CO 2 -20%H 2 O gas. All 20Cr alloys developed a multilayered scale, and the outer scale layers on alloys containing iron were subject to spallation. However, all 30Cr alloys developed a scale which was predominantly chromia scale and resisted spallation. These effects are discussed in terms of Fe alloying effects on oxide scale development in the presence of water vapour. Differences between scaling behaviour in wet and dry CO 2 are shown to be explained by changed oxide transport properties.
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ISSN:0030-770X
2731-8397
1573-4889
2731-8400
DOI:10.1007/s11085-020-09987-2