A Microstructural and Kinetic Investigation of the KCl-Induced Corrosion of an FeCrAl Alloy at 600 °C
Abstract
In this paper, the corrosion behaviour of a FeCrAl alloy was investigated at 600 °C in O2 + H2O with solid KCl applied. A kinetics and microstructural investigation showed that KCl accelerates corrosion and that potassium chromate formation depletes the protective scale in Cr, thus triggering the formation of a fast-growing iron-rich scale. Iron oxide was found to grow both inward and outward, on either side of the initial oxide. A chromia layer is formed with time underneath the iron oxide. Finally, it was found that although the alloy does not form a continuous pure alumina scale at the investigated temperature, aluminium is, however, always enriched at the oxide/alloy interface.
- Authors:
-
- Chalmers Univ. of Technology, Gothenburg (Sweden). The Swedish Competence Centre for High Temperature Corrosion
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Chalmers Univ. of Technology, Gothenburg (Sweden). Dept. of Materials and Manufacturing Technology
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1286716
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Oxidation of Metals
- Additional Journal Information:
- Journal Volume: 84; Journal Issue: 1; Journal ID: ISSN 0030-770X
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; FeCrAl; high-temperature corrosion; water vapour; KCl
Citation Formats
Israelsson, Niklas, Unocic, Kinga A., Hellström, K., Jonsson, T., Norell, M., Svensson, J. -E., and Johansson, L. -G. A Microstructural and Kinetic Investigation of the KCl-Induced Corrosion of an FeCrAl Alloy at 600 °C. United States: N. p., 2015.
Web. doi:10.1007/s11085-015-9546-3.
Israelsson, Niklas, Unocic, Kinga A., Hellström, K., Jonsson, T., Norell, M., Svensson, J. -E., & Johansson, L. -G. A Microstructural and Kinetic Investigation of the KCl-Induced Corrosion of an FeCrAl Alloy at 600 °C. United States. https://doi.org/10.1007/s11085-015-9546-3
Israelsson, Niklas, Unocic, Kinga A., Hellström, K., Jonsson, T., Norell, M., Svensson, J. -E., and Johansson, L. -G. Wed .
"A Microstructural and Kinetic Investigation of the KCl-Induced Corrosion of an FeCrAl Alloy at 600 °C". United States. https://doi.org/10.1007/s11085-015-9546-3. https://www.osti.gov/servlets/purl/1286716.
@article{osti_1286716,
title = {A Microstructural and Kinetic Investigation of the KCl-Induced Corrosion of an FeCrAl Alloy at 600 °C},
author = {Israelsson, Niklas and Unocic, Kinga A. and Hellström, K. and Jonsson, T. and Norell, M. and Svensson, J. -E. and Johansson, L. -G.},
abstractNote = {In this paper, the corrosion behaviour of a FeCrAl alloy was investigated at 600 °C in O2 + H2O with solid KCl applied. A kinetics and microstructural investigation showed that KCl accelerates corrosion and that potassium chromate formation depletes the protective scale in Cr, thus triggering the formation of a fast-growing iron-rich scale. Iron oxide was found to grow both inward and outward, on either side of the initial oxide. A chromia layer is formed with time underneath the iron oxide. Finally, it was found that although the alloy does not form a continuous pure alumina scale at the investigated temperature, aluminium is, however, always enriched at the oxide/alloy interface.},
doi = {10.1007/s11085-015-9546-3},
journal = {Oxidation of Metals},
number = 1,
volume = 84,
place = {United States},
year = {Wed Mar 18 00:00:00 EDT 2015},
month = {Wed Mar 18 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Chlorine-induced high temperature corrosion of HVAF-sprayed Ni-based alumina and chromia forming coatings
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