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Title: Effect of Surface Finish on High-Temperature Oxidation of Steels in CO 2, Supercritical CO 2, and Air

Abstract

Current and future power systems require steels resistant to high-temperature oxidation in CO 2-rich environments. The introduction of structural defects by various surface treatments can profoundly affect the oxidation/corrosion behavior of steels in many environments. This effect is largely unexplored for steels exposed to high-temperature CO 2, which is the focus of this work. We prepared Grade 22, Grade 91, 347H, and 310S steels with three different surface finishes, ranging from little to substantial surface damage, and exposed the steels to 1 bar CO 2, 200 bar supercritical CO 2, and laboratory air at 550 °C for up to 1500 h. Surface finish had little impact on the oxidation behavior of low-Cr (2 wt%) Grade 22 and high-Cr (25 wt%) 310S steels. In contrast, intermediate-Cr steels Grade 91 (8 wt%) and 347H (17 wt%) generally showed improved oxidation and carburization resistance with increasing extent of surface damage, which was attributed to the delay or prevention of the onset of Fe-rich oxide nodule growth. Comparison between exposure environments suggests that this effect is more complex for CO 2 compared to air and that it is additionally affected by CO 2 pressure. In conclusion, the results suggest that surface treatments should bemore » considered as one approach to achieve improved corrosion resistance in high-temperature CO 2, particularly for steels containing Cr levels near the transition that is required to form and maintain a protective Cr-rich oxide scale.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [2]; ORCiD logo [2]
  1. National Energy Technology Lab. (NETL), Albany, OR (United States); Leidos Research Support Team, Albany, OR (United States)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1607756
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Oxidation of Metals
Additional Journal Information:
Journal Volume: 92; Journal Issue: 5-6; Journal ID: ISSN 0030-770X
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; steel oxidation; supercritical CO2; surface finish; surface cold working; chromia; selective oxidation; carburization

Citation Formats

Oleksak, Richard P., Holcomb, Gordon R., Carney, Casey S., Teeter, Lucas, and Doğan, Ömer N. Effect of Surface Finish on High-Temperature Oxidation of Steels in CO2, Supercritical CO2, and Air. United States: N. p., 2019. Web. doi:10.1007/s11085-019-09938-6.
Oleksak, Richard P., Holcomb, Gordon R., Carney, Casey S., Teeter, Lucas, & Doğan, Ömer N. Effect of Surface Finish on High-Temperature Oxidation of Steels in CO2, Supercritical CO2, and Air. United States. https://doi.org/10.1007/s11085-019-09938-6
Oleksak, Richard P., Holcomb, Gordon R., Carney, Casey S., Teeter, Lucas, and Doğan, Ömer N. Wed . "Effect of Surface Finish on High-Temperature Oxidation of Steels in CO2, Supercritical CO2, and Air". United States. https://doi.org/10.1007/s11085-019-09938-6. https://www.osti.gov/servlets/purl/1607756.
@article{osti_1607756,
title = {Effect of Surface Finish on High-Temperature Oxidation of Steels in CO2, Supercritical CO2, and Air},
author = {Oleksak, Richard P. and Holcomb, Gordon R. and Carney, Casey S. and Teeter, Lucas and Doğan, Ömer N.},
abstractNote = {Current and future power systems require steels resistant to high-temperature oxidation in CO2-rich environments. The introduction of structural defects by various surface treatments can profoundly affect the oxidation/corrosion behavior of steels in many environments. This effect is largely unexplored for steels exposed to high-temperature CO2, which is the focus of this work. We prepared Grade 22, Grade 91, 347H, and 310S steels with three different surface finishes, ranging from little to substantial surface damage, and exposed the steels to 1 bar CO2, 200 bar supercritical CO2, and laboratory air at 550 °C for up to 1500 h. Surface finish had little impact on the oxidation behavior of low-Cr (2 wt%) Grade 22 and high-Cr (25 wt%) 310S steels. In contrast, intermediate-Cr steels Grade 91 (8 wt%) and 347H (17 wt%) generally showed improved oxidation and carburization resistance with increasing extent of surface damage, which was attributed to the delay or prevention of the onset of Fe-rich oxide nodule growth. Comparison between exposure environments suggests that this effect is more complex for CO2 compared to air and that it is additionally affected by CO2 pressure. In conclusion, the results suggest that surface treatments should be considered as one approach to achieve improved corrosion resistance in high-temperature CO2, particularly for steels containing Cr levels near the transition that is required to form and maintain a protective Cr-rich oxide scale.},
doi = {10.1007/s11085-019-09938-6},
url = {https://www.osti.gov/biblio/1607756}, journal = {Oxidation of Metals},
issn = {0030-770X},
number = 5-6,
volume = 92,
place = {United States},
year = {2019},
month = {10}
}

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Cited by: 2 works
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