Surface segregation effect for prevention of oxidation in Ni‐X (X=Sn, Sb) alloy by in situ photoelectron spectroscopy

Ni‐base alloys has been widely used for chemical plants because of their high strength and excellent oxidation resistance. In particular, the addition of Sn and Sb in Ni‐base alloys significantly improves the metal dusting resistance. It is indicated that Sn and Sb are segregated on the alloy surfac...

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Published inSurface and interface analysis Vol. 52; no. 12; pp. 1117 - 1121
Main Authors Doi, Takashi, Yoshigoe, Akitaka
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.12.2020
Subjects
Alloys
Antimony
Metal dusting
Nickel base alloys
Oxidation
Oxidation resistance
Photoelectron spectroscopy
Photoelectrons
Spectrum analysis
Tin
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Summary:Ni‐base alloys has been widely used for chemical plants because of their high strength and excellent oxidation resistance. In particular, the addition of Sn and Sb in Ni‐base alloys significantly improves the metal dusting resistance. It is indicated that Sn and Sb are segregated on the alloy surface in the metal dusting environment; however, the details have not been clarified yet. The behavior of the Ni‐Sn and Ni‐Sb alloys under a high‐temperature oxidation environment was investigated by in situ X‐ray photoelectron spectroscopy (XPS). It was confirmed that Sn and Sb have been segregated at the surface of their alloys during oxidation in low oxygen potential, PO2, environment. These results indicate that Sn and Sb segregation improves the metal dusting resistance.
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ISSN:0142-2421
1096-9918
DOI:10.1002/sia.6802