Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment
Stabilization treatment is an effective way to improve the long-term corrosion resistance of low-Mg content (≤5 wt%) Al alloys due to the formation of discontinuous grain boundary β-Al3Mg2 precipitates. Increasing the Mg content can dramatically improve the strength of the alloy by Mg atom solid sol...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425016011 |
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| author | Hongbin Wang Zhen Zhang Wang Liu Tianxu Ji Hongxiang Li Di Zhang |
| author_facet | Hongbin Wang Zhen Zhang Wang Liu Tianxu Ji Hongxiang Li Di Zhang |
| author_sort | Hongbin Wang |
| collection | DOAJ |
| description | Stabilization treatment is an effective way to improve the long-term corrosion resistance of low-Mg content (≤5 wt%) Al alloys due to the formation of discontinuous grain boundary β-Al3Mg2 precipitates. Increasing the Mg content can dramatically improve the strength of the alloy by Mg atom solid solution. However, achieving long-term corrosion resistance of such high-Mg (>6 wt%) aluminum alloys still poses a serious challenge. In this study to solve the trade-off between strength and long-term corrosion resistance, a synergistic approach combining Zn microalloying with optimized stabilization treatment parameters is employed to improve the comprehensive performance of Al-7wt.%Mg alloy. The Zn-containing alloy demonstrates enhanced spheroidization of GBPs and reduced Mg content in the matrix, both contributing to superior sensitization annealing performance. Theoretical modeling incorporating grain boundary diffusion mechanism and phase-interface interactions confirms that Zn-containing alloys exhibit a significant reduction in grain boundary phase elongation rate during accelerated sensitization compared with Zn-free counterparts. This research provides critical guidance for developing corrosion-resistant high-Mg aluminum alloys in marine engineering applications. |
| format | Article |
| id | doaj-art-e4abce4b238542efb6a66f327493a437 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-e4abce4b238542efb6a66f327493a4372025-08-20T02:35:22ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01372475248410.1016/j.jmrt.2025.06.179Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatmentHongbin Wang0Zhen Zhang1Wang Liu2Tianxu Ji3Hongxiang Li4Di Zhang5State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Stabilization treatment is an effective way to improve the long-term corrosion resistance of low-Mg content (≤5 wt%) Al alloys due to the formation of discontinuous grain boundary β-Al3Mg2 precipitates. Increasing the Mg content can dramatically improve the strength of the alloy by Mg atom solid solution. However, achieving long-term corrosion resistance of such high-Mg (>6 wt%) aluminum alloys still poses a serious challenge. In this study to solve the trade-off between strength and long-term corrosion resistance, a synergistic approach combining Zn microalloying with optimized stabilization treatment parameters is employed to improve the comprehensive performance of Al-7wt.%Mg alloy. The Zn-containing alloy demonstrates enhanced spheroidization of GBPs and reduced Mg content in the matrix, both contributing to superior sensitization annealing performance. Theoretical modeling incorporating grain boundary diffusion mechanism and phase-interface interactions confirms that Zn-containing alloys exhibit a significant reduction in grain boundary phase elongation rate during accelerated sensitization compared with Zn-free counterparts. This research provides critical guidance for developing corrosion-resistant high-Mg aluminum alloys in marine engineering applications.http://www.sciencedirect.com/science/article/pii/S2238785425016011Al–Mg alloyAccelerated sensitization annealingIntergranular corrosion resistanceDiffusion kinetics |
| spellingShingle | Hongbin Wang Zhen Zhang Wang Liu Tianxu Ji Hongxiang Li Di Zhang Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment Journal of Materials Research and Technology Al–Mg alloy Accelerated sensitization annealing Intergranular corrosion resistance Diffusion kinetics |
| title | Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment |
| title_full | Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment |
| title_fullStr | Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment |
| title_full_unstemmed | Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment |
| title_short | Enhancing long-term corrosion resistance of Zn modified high-Mg aluminum alloys through optimized stabilization treatment |
| title_sort | enhancing long term corrosion resistance of zn modified high mg aluminum alloys through optimized stabilization treatment |
| topic | Al–Mg alloy Accelerated sensitization annealing Intergranular corrosion resistance Diffusion kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425016011 |
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