Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization
XPS combined with AFM have been used to investigate the surface modifications of nuclear grade FeCrAl-xNb (x= 0, 0.5, 1.0, 1.5 wt.%) alloys, induced by anodic polarization in a simulated primary coolant. Electrochemical tests were performed to study the role of the minor element Nb on the corrosion...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522003501 |
| _version_ | 1818216485432066048 |
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| author | Li Ma Frédéric Wiame Xi Chen Xianfeng Ma |
| author_facet | Li Ma Frédéric Wiame Xi Chen Xianfeng Ma |
| author_sort | Li Ma |
| collection | DOAJ |
| description | XPS combined with AFM have been used to investigate the surface modifications of nuclear grade FeCrAl-xNb (x= 0, 0.5, 1.0, 1.5 wt.%) alloys, induced by anodic polarization in a simulated primary coolant. Electrochemical tests were performed to study the role of the minor element Nb on the corrosion potential and composition. The optimal content of Nb, obtained after the comparative analysis of the UHV-sputtered surface, native oxide-covered surface and anodic polarized surface, is 0.5 wt.%. This alloy presents a more compact Al-enriched oxide film consistent with a higher corrosion potential at −89 mV. The protectiveness of oxide film against the active dissolution can be improved by Nb addition, but does not increases linearly with Nb content. High resolution XPS analysis details the changes of Nb oxidized states, and provides the stratification of the oxide film containing the (hydr) oxides of Fe, Al and Cr. |
| first_indexed | 2024-12-12T06:52:43Z |
| format | Article |
| id | doaj.art-ddecabf5ebb64bfb948ca254eaf58b9d |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-12T06:52:43Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-ddecabf5ebb64bfb948ca254eaf58b9d2022-12-22T00:34:02ZengElsevierMaterials & Design0264-12752022-07-01219110728Effect of Nb on the surface composition of FeCrAl alloys after anodic polarizationLi Ma0Frédéric Wiame1Xi Chen2Xianfeng Ma3Department of Materials Science, Fudan University, Shanghai 200433, China; Zhuhai Fudan Innovation Institute, Hengqin New Area, Zhuhai 519000, ChinaPSL University, CNRS-Chimie ParisTech, Institut de Recherche de Chimie Paris, Physical Chemistry of Surfaces Group, 75005 Paris, FranceDepartment of Materials Science, Fudan University, Shanghai 200433, China; Zhuhai Fudan Innovation Institute, Hengqin New Area, Zhuhai 519000, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, Guangdong, China; Corresponding author.XPS combined with AFM have been used to investigate the surface modifications of nuclear grade FeCrAl-xNb (x= 0, 0.5, 1.0, 1.5 wt.%) alloys, induced by anodic polarization in a simulated primary coolant. Electrochemical tests were performed to study the role of the minor element Nb on the corrosion potential and composition. The optimal content of Nb, obtained after the comparative analysis of the UHV-sputtered surface, native oxide-covered surface and anodic polarized surface, is 0.5 wt.%. This alloy presents a more compact Al-enriched oxide film consistent with a higher corrosion potential at −89 mV. The protectiveness of oxide film against the active dissolution can be improved by Nb addition, but does not increases linearly with Nb content. High resolution XPS analysis details the changes of Nb oxidized states, and provides the stratification of the oxide film containing the (hydr) oxides of Fe, Al and Cr.http://www.sciencedirect.com/science/article/pii/S0264127522003501FeCrAl alloyNb substitutionAccident tolerant fuelChemical compositionOxide film |
| spellingShingle | Li Ma Frédéric Wiame Xi Chen Xianfeng Ma Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization Materials & Design FeCrAl alloy Nb substitution Accident tolerant fuel Chemical composition Oxide film |
| title | Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization |
| title_full | Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization |
| title_fullStr | Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization |
| title_full_unstemmed | Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization |
| title_short | Effect of Nb on the surface composition of FeCrAl alloys after anodic polarization |
| title_sort | effect of nb on the surface composition of fecral alloys after anodic polarization |
| topic | FeCrAl alloy Nb substitution Accident tolerant fuel Chemical composition Oxide film |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522003501 |
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