Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃
FeCrAl alloy is one of the potential candidates of structural materials due to its high strength, low radiation swelling and good oxidation resistance for the application of lead-cooled fast reactors (LFRs). Particularly, FeCrAl alloy can form protective Al-containing oxide scales after exposure to...
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| Format: | Article |
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Elsevier
2024-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179124000127 |
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| author | Hao Ren Xian Zeng Xiaoxin Zhang Jun Zhang Xiaodong Huang Xintong Zhang Qingzhi Yan |
| author_facet | Hao Ren Xian Zeng Xiaoxin Zhang Jun Zhang Xiaodong Huang Xintong Zhang Qingzhi Yan |
| author_sort | Hao Ren |
| collection | DOAJ |
| description | FeCrAl alloy is one of the potential candidates of structural materials due to its high strength, low radiation swelling and good oxidation resistance for the application of lead-cooled fast reactors (LFRs). Particularly, FeCrAl alloy can form protective Al-containing oxide scales after exposure to liquid oxygen-rich Pb and lead–bismuth eutectic (LBE) at 400–800 ℃, showing better performance than traditional commercial stainless steels such as T91, 316L and 15-15Ti. Given the possibility that oxygen in liquid metal could be consumed and not be supplied timely in some quasi-static regions of the actual coolant circuit, to figure out the corrosion behavior of FeCrAl alloy in oxygen-depleted LBE is necessary. In this work, the commercial FeCrAl alloy was exposed to static liquid LBE containing Ni impurities with 10−9 wt% oxygen concentration at 600 ℃ for up to 5000 h, and the surface and cross-sectional morphology of the samples was characterized and analysed. It is found that FeCrAl alloy underwent severe dissolution corrosion, and the maximum penetration depth of LBE reached 161.4 μm after the test for 5000 h; PbBi infiltrated into alloy matrix along the GBs and selectively leached Al from the affected grains. Besides, an interesting discovery is the Cr-rich thin layer at LBE/matrix interface and Ni3Al precipitates in LBE penetration front which should be attributed to the deposition of impurity elements dissolved in liquid LBE during the cooling process. |
| first_indexed | 2024-03-08T13:19:39Z |
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| id | doaj.art-65fc810564164db887681e0254d26007 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-04-25T00:04:48Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
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| series | Nuclear Materials and Energy |
| spelling | doaj.art-65fc810564164db887681e0254d260072024-03-14T06:14:50ZengElsevierNuclear Materials and Energy2352-17912024-03-0138101590Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃Hao Ren0Xian Zeng1Xiaoxin Zhang2Jun Zhang3Xiaodong Huang4Xintong Zhang5Qingzhi Yan6Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; China Nuclear Power Technology Research Institute, Shenzhen 518000, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors at: Xueyuan Road 30, Haidian District, Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaChina Nuclear Power Technology Research Institute, Shenzhen 518000, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors at: Xueyuan Road 30, Haidian District, Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.FeCrAl alloy is one of the potential candidates of structural materials due to its high strength, low radiation swelling and good oxidation resistance for the application of lead-cooled fast reactors (LFRs). Particularly, FeCrAl alloy can form protective Al-containing oxide scales after exposure to liquid oxygen-rich Pb and lead–bismuth eutectic (LBE) at 400–800 ℃, showing better performance than traditional commercial stainless steels such as T91, 316L and 15-15Ti. Given the possibility that oxygen in liquid metal could be consumed and not be supplied timely in some quasi-static regions of the actual coolant circuit, to figure out the corrosion behavior of FeCrAl alloy in oxygen-depleted LBE is necessary. In this work, the commercial FeCrAl alloy was exposed to static liquid LBE containing Ni impurities with 10−9 wt% oxygen concentration at 600 ℃ for up to 5000 h, and the surface and cross-sectional morphology of the samples was characterized and analysed. It is found that FeCrAl alloy underwent severe dissolution corrosion, and the maximum penetration depth of LBE reached 161.4 μm after the test for 5000 h; PbBi infiltrated into alloy matrix along the GBs and selectively leached Al from the affected grains. Besides, an interesting discovery is the Cr-rich thin layer at LBE/matrix interface and Ni3Al precipitates in LBE penetration front which should be attributed to the deposition of impurity elements dissolved in liquid LBE during the cooling process.http://www.sciencedirect.com/science/article/pii/S2352179124000127FeCrAl alloyOxygen-depleted LBEDissolution corrosionSelective Al leachingImpurity elements |
| spellingShingle | Hao Ren Xian Zeng Xiaoxin Zhang Jun Zhang Xiaodong Huang Xintong Zhang Qingzhi Yan Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ Nuclear Materials and Energy FeCrAl alloy Oxygen-depleted LBE Dissolution corrosion Selective Al leaching Impurity elements |
| title | Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ |
| title_full | Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ |
| title_fullStr | Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ |
| title_full_unstemmed | Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ |
| title_short | Dissolution corrosion of FeCrAl alloy exposed to oxygen-depleted lead–bismuth eutectic containing Ni impurities at 600 ℃ |
| title_sort | dissolution corrosion of fecral alloy exposed to oxygen depleted lead bismuth eutectic containing ni impurities at 600 ℃ |
| topic | FeCrAl alloy Oxygen-depleted LBE Dissolution corrosion Selective Al leaching Impurity elements |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124000127 |
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