Sammanfattning
The goal of this study was to use 18O-enriched water to better understand the role of H2O in high-temperature oxidation. Seven model and three commercial M-Cr and M-Cr-Al alloys were studied in air with 10% of H2O at 800 °C for 5 h. Oxygen from water vapor was more reactive than oxygen from the air and 18O enriched at the outermost layers of the formed Cr- and Al-rich oxides. Alloys with Al and/or Ti additions showed signs of internal oxidation but 18O was not enriched inside the alloy in locations with internal oxidation. Depending on the alloy Al content, the oxide went from Al oxidation beneath a chromia scale to external alumina scale formation.
| Originalspråk | Engelska |
|---|---|
| Artikelnummer | 1 |
| Sidor (från-till) | 1-18 |
| Tidskrift | High Temperature Corrosion of Materials |
| Volym | 102 |
| Nummer | 1 |
| DOI | |
| Status | Publicerad - feb. 2025 |
| MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Finansiering
The authors would like to thank T. M. Lowe and T. Jordan for their assistance with the experimental work. This work has been carried out within the Research Council of Finland project \u201CInitiation and propagation of high-temperature corrosion reactions in complex oxygen-containing environments\u201D (Decision no. 348963). This research was sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Industrial Efficiency and Decarbonization Office, Combined Heat and Power Program. M. Ridley and M. Romedenne provided helpful comments on the manuscript.
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