High temperature oxidation of steels in CO2 containing impurities

High temperature oxidation of steels in CO2 containing impurities

Future power systems require steels that resist corrosion in high temperature CO2 containing combustion products/impurities. Here we evaluate the corrosion behavior of several commercial steels exposed to 95% CO2-4 % H2O-1 % O2, with/without 0.1 % SO2, at 550 °C and 1 atm. High-Cr steels formed thin...

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Bibliographic Details
Published in:Corrosion science Vol. 164; no. C
Main Authors: Oleksak, Richard P., Tylczak, Joseph H., Holcomb, Gordon R., Doğan, Ömer N.
Format: Journal Article
Language:English
Published: United States Elsevier 09-11-2019
Subjects:
MATERIALS SCIENCE
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Summary:Future power systems require steels that resist corrosion in high temperature CO2 containing combustion products/impurities. Here we evaluate the corrosion behavior of several commercial steels exposed to 95% CO2-4 % H2O-1 % O2, with/without 0.1 % SO2, at 550 °C and 1 atm. High-Cr steels formed thin Cr-rich oxides and low-Cr steels thick Fe-rich oxides during SO2-free exposures. Additions of SO2 had little effect on low-Cr steels but enhanced corrosion of high-Cr steels, where S within the chromia scale led to its failure and subsequent Fe-rich oxide nodule growth. Ultimately, the results are rationalized by considering the thermodynamic and kinetic factors controlling the reaction.
Bibliography:USDOE Office of Fossil Energy (FE)
89243318CFE000003
RSS097
ISSN:0010-938X
1879-0496