Beneficial effect of shot peening on steamside oxidation of 300-series austenitic steels: An electrochemical study
| Autor: | Jiří Děd, Václav Bystrianský, Jan M. Macak, E.O. Eltai, Aneta Krausová, Abdel Magid Hamouda |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
High temperature corrosion 020209 energy Oxide General Physics and Astronomy 02 engineering and technology Electrochemistry Shot peening Corrosion chemistry.chemical_compound symbols.namesake Mott-Schottky 0202 electrical engineering electronic engineering information engineering Protective oxide Super304H Austenite Metallurgy Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Exfoliation joint Surfaces Coatings and Films chemistry SEM symbols 0210 nano-technology Raman spectroscopy |
| Popis: | The formation of a protective oxide ensures the good corrosion resistance of austenitic steels in high temperature steam. However after long-term interaction even the protective oxide may tend to exfoliate and cause operational problems. With shot peening believed to be an effective method for mitigating steamside oxidation and exfoliation, we compared oxide layers formed on two materials: AISI 316H with a rugged untreated surface and Super304H with a shot-peened surface. In addition to conventional methods (SEM/EDS, Raman spectroscopy), Mott-Schottky analysis was used to characterize the oxide layers in order to determine the quality of the protective oxide. The oxides formed on Super 304H showed unexpected semiconducting behaviour with a significantly lower charge carrier density, thereby supporting the benefits of shot peening. Our findings extend the knowledge applicable to the design of more efficient coal-fired power plants. This study was supported by specific university research (MSMT No 20-SVV/2017) and financial support from the Czech Science Foundation, grant 16-03085S. Scopus |
| Databáze: | OpenAIRE |
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