Thin Sol–Gel Alumina Coating as Protection of a 9% Cr Steel Against Flue Gas Corrosion at 650 °C
| Autor: | I. Dörfel, Axel Kranzmann, Nicole Wollschläger, Marianne Nofz, Wencke Schulz, Maria Mosquera-Feijoo, Regine Sojref |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Flue gas Materials science High-temperature corrosion Metallurgy technology industry and agriculture Metals and Alloys Oxide 02 engineering and technology Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Corrosion Inorganic Chemistry chemistry.chemical_compound Coating chemistry 0103 physical sciences Materials Chemistry engineering 0210 nano-technology Porosity Sol-gel |
| Zdroj: | Oxidation of Metals. 89:453-470 |
| ISSN: | 1573-4889 0030-770X |
| Popis: | Samples of sol–gel alumina-coated and uncoated P92 steel were exposed to flue gas at 650 °C for 300 h to register and characterize the early stages of the protection effect of that coating. As a result of this treatment, a 50-µm-thick bilayered oxide scale had formed on the surface of the uncoated sample. Below the scale a 40-µm-thick inner oxidation zone was detected. In contrast, the porous, micron-thick alumina coating enabled the formation of a chromium oxide scale with a thickness of some nanometres at the interface between steel substrate and coating. In this case, high-temperature corrosion of the steel was prevented so far. |
| Databáze: | OpenAIRE |
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