Change in the Morphology of Alloy Corrosion Products Based on the FeAl Intermetallic Phase After Oxidation in Water Vapor at a Temperature of 700 °C for up to 2000 h
The surface of the Fe40Al5Cr0.2TiB alloy, after oxidation in steam at 700 °C, showed a varied morphology dependent on oxidation time. Initially, a fine, acicular oxide layer formed, which over time transformed into a more compact, lumpy structure corresponding to the α-Al<sub>2</sub>O<sub>3</sub> phase. EDS analysis confirmed the dominance of aluminum and oxygen in the oxidation products, and XRD studies revealed the presence of the α-alumina phase. Optical profilometry revealed a significant increase in roughness parameters (R<sub>a</sub> and R<sub>z</sub>) after long-term exposure (2000 h), which correlates with the thickening and sinterization of the oxide layer. The obtained results indicate that in a water vapor environment, a stable α-Al<sub>2</sub>O<sub>3</sub> phase can already be formed at a temperature of 700 °C, and its development leads to increased roughness.
Authors
- Andrzej Swinarew (ORCID: https://orcid.org/0000-0001-6116-9510)
- Dorota Pasek (ORCID: https://orcid.org/0000-0002-5327-6700)
- M. Sozańska (ORCID: https://orcid.org/0000-0002-0317-3949)
- J. Wieczorek (ORCID: https://orcid.org/0000-0002-4403-3125)
- J. Cebulski (ORCID: https://orcid.org/0000-0002-3813-8705)
- Jadwiga Gabor (ORCID: https://orcid.org/0000-0003-4850-1608)
- Magdalena Popczyk (ORCID: https://orcid.org/0000-0003-2440-1741)
Institutions
- Silesian University of Technology (PL)
- Akademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach (PL)
- University of Silesia in Katowice (PL)
Publication Details
- Journal
- Materials
- Published
- 2025-11-12
- DOI
- https://doi.org/10.3390/ma18225150
- Primary Topic
- High-Temperature Coating Behaviors
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- European Commission