Mechanistic insights into the oxidation behavior of Ni alloys in high-temperature CO2
Abstract
We present results of a Ni superalloy oxidized for short times in high purity CO2 and similarly in Ar containing ≤ 1 ppb O2. A detailed analysis of the oxidized surfaces reveals striking similarities for the two exposure environments, suggesting O2 impurities control the oxidation process in high-temperature CO2. Selective oxidation results in Cr-rich oxide layers grown by 2 outward diffusion, while Cr vacancies left in the metal contribute to significant void formation at the oxide/metal interface. Unlike for most of the alloy surface, the oxidation behavior of secondary phase metal carbides is considerably different in the two environments.
- Authors:
-
- National Energy Technology Lab. (NETL), Albany, OR (United States)
- National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
- National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, Albany, OR (United States)
- Publication Date:
- Research Org.:
- National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1366428
- Alternate Identifier(s):
- OSTI ID: 1495539
- Report Number(s):
- NETL-PUB-20826
Journal ID: ISSN 0010-938X
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Corrosion Science
- Additional Journal Information:
- Journal Volume: 125; Journal ID: ISSN 0010-938X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Oleksak, Richard P., Baltrus, John P., Nakano, Jinichiro, Nakano, Anna, Holcomb, Gordon R., and Dogan, Omer N. Mechanistic insights into the oxidation behavior of Ni alloys in high-temperature CO2. United States: N. p., 2017.
Web. doi:10.1016/j.corsci.2017.06.005.
Oleksak, Richard P., Baltrus, John P., Nakano, Jinichiro, Nakano, Anna, Holcomb, Gordon R., & Dogan, Omer N. Mechanistic insights into the oxidation behavior of Ni alloys in high-temperature CO2. United States. https://doi.org/10.1016/j.corsci.2017.06.005
Oleksak, Richard P., Baltrus, John P., Nakano, Jinichiro, Nakano, Anna, Holcomb, Gordon R., and Dogan, Omer N. Thu .
"Mechanistic insights into the oxidation behavior of Ni alloys in high-temperature CO2". United States. https://doi.org/10.1016/j.corsci.2017.06.005. https://www.osti.gov/servlets/purl/1366428.
@article{osti_1366428,
title = {Mechanistic insights into the oxidation behavior of Ni alloys in high-temperature CO2},
author = {Oleksak, Richard P. and Baltrus, John P. and Nakano, Jinichiro and Nakano, Anna and Holcomb, Gordon R. and Dogan, Omer N.},
abstractNote = {We present results of a Ni superalloy oxidized for short times in high purity CO2 and similarly in Ar containing ≤ 1 ppb O2. A detailed analysis of the oxidized surfaces reveals striking similarities for the two exposure environments, suggesting O2 impurities control the oxidation process in high-temperature CO2. Selective oxidation results in Cr-rich oxide layers grown by 2 outward diffusion, while Cr vacancies left in the metal contribute to significant void formation at the oxide/metal interface. Unlike for most of the alloy surface, the oxidation behavior of secondary phase metal carbides is considerably different in the two environments.},
doi = {10.1016/j.corsci.2017.06.005},
journal = {Corrosion Science},
number = ,
volume = 125,
place = {United States},
year = {2017},
month = {6}
}
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Works referencing / citing this record:
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