High temperature oxidation of Co-W electroplated type 430 stainless steel for the interconnect of solid oxide fuel cells
| Autor: | Isao Saeki, Hideyuki Murakami, Lu Gan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science General Chemical Engineering Diffusion Alloy Inorganic chemistry Oxide 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Corrosion Divalent chemistry.chemical_compound chemistry Vacancy defect engineering General Materials Science 0210 nano-technology Electroplating Layer (electronics) |
| Zdroj: | Corrosion Science. 134:162-168 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2018.02.026 |
| Popis: | Cobalt–tungsten alloy layer containing 2.4 at% W was electroplated on type 430 stainless steel (Fe–16 mass% Cr), and it was subjected to high-temperature oxidation at 800 °C in Air–3 vol% H2O atmosphere for 1000 h. A five-layered oxide of Co3O4, FeCo2O4, CoWO4, (Co,Fe,Cr)3O4, and Cr2O3 formed within 1 h, and the structure retained up to 1000 h. The outward diffusion of Cr3+ was effectively prevented by the CoWO4 layer. In the oxide, Co and W exist as divalent and hexavalent ions respectively, and there is no trivalent cation sites or trivalent cation vacancy through which Cr3+ diffuses. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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