An additively manufactured magnesium-aluminium alloy withstands seawater corrosion
<jats:title>Abstract</jats:title><jats:p>Magnesium, the lightest structural metal, has inherently poor corrosion resistance. In this study, we developed a magnesium-aluminium Mg-10.6Al-0.6Zn-0.3Mn alloy, additively manufactured by laser powder bed fusion. We reveal that this alloy...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer Science and Business Media LLC
2022
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| Online Access: | https://hdl.handle.net/1721.1/142472 |
| _version_ | 1826211762689540096 |
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| author | Zeng, Zhuoran Choudhary, Sanjay Esmaily, Marco Benn, Felix Derra, Thomas Hora, Yvonne Kopp, Alexander Allanore, Antoine Birbilis, Nick |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Zeng, Zhuoran Choudhary, Sanjay Esmaily, Marco Benn, Felix Derra, Thomas Hora, Yvonne Kopp, Alexander Allanore, Antoine Birbilis, Nick |
| author_sort | Zeng, Zhuoran |
| collection | MIT |
| description | <jats:title>Abstract</jats:title><jats:p>Magnesium, the lightest structural metal, has inherently poor corrosion resistance. In this study, we developed a magnesium-aluminium Mg-10.6Al-0.6Zn-0.3Mn alloy, additively manufactured by laser powder bed fusion. We reveal that this alloy has a record low degradation rate amongst all magnesium alloys in practically relevant corrosive solutions, and it even withstands seawater corrosion. As tested by a number of methods, the alloy shows even more enhanced passivation with longer immersion periods. The alloy surface following immersion maintained a nearly corrosion-free appearance and was determined to have a thin aluminium-containing surface film, due to surface enrichment of aluminium from the supersaturated matrix. Aluminium enrichment near the sample surface was also observed when the sample is immersed in phosphoric acid or exposed to atmosphere at room temperature. This study demonstrates the prospects for additively manufactured ultra-lightweight magnesium structure with outstanding corrosion resistance.</jats:p> |
| first_indexed | 2024-09-23T15:10:44Z |
| format | Article |
| id | mit-1721.1/142472 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:10:44Z |
| publishDate | 2022 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1424722023-02-09T21:45:11Z An additively manufactured magnesium-aluminium alloy withstands seawater corrosion Zeng, Zhuoran Choudhary, Sanjay Esmaily, Marco Benn, Felix Derra, Thomas Hora, Yvonne Kopp, Alexander Allanore, Antoine Birbilis, Nick Massachusetts Institute of Technology. Department of Materials Science and Engineering <jats:title>Abstract</jats:title><jats:p>Magnesium, the lightest structural metal, has inherently poor corrosion resistance. In this study, we developed a magnesium-aluminium Mg-10.6Al-0.6Zn-0.3Mn alloy, additively manufactured by laser powder bed fusion. We reveal that this alloy has a record low degradation rate amongst all magnesium alloys in practically relevant corrosive solutions, and it even withstands seawater corrosion. As tested by a number of methods, the alloy shows even more enhanced passivation with longer immersion periods. The alloy surface following immersion maintained a nearly corrosion-free appearance and was determined to have a thin aluminium-containing surface film, due to surface enrichment of aluminium from the supersaturated matrix. Aluminium enrichment near the sample surface was also observed when the sample is immersed in phosphoric acid or exposed to atmosphere at room temperature. This study demonstrates the prospects for additively manufactured ultra-lightweight magnesium structure with outstanding corrosion resistance.</jats:p> 2022-05-11T15:33:35Z 2022-05-11T15:33:35Z 2022-12 2022-05-11T15:29:47Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142472 Zeng, Zhuoran, Choudhary, Sanjay, Esmaily, Marco, Benn, Felix, Derra, Thomas et al. 2022. "An additively manufactured magnesium-aluminium alloy withstands seawater corrosion." npj Materials Degradation, 6 (1). en 10.1038/s41529-022-00241-5 npj Materials Degradation Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf Springer Science and Business Media LLC Nature |
| spellingShingle | Zeng, Zhuoran Choudhary, Sanjay Esmaily, Marco Benn, Felix Derra, Thomas Hora, Yvonne Kopp, Alexander Allanore, Antoine Birbilis, Nick An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title | An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title_full | An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title_fullStr | An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title_full_unstemmed | An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title_short | An additively manufactured magnesium-aluminium alloy withstands seawater corrosion |
| title_sort | additively manufactured magnesium aluminium alloy withstands seawater corrosion |
| url | https://hdl.handle.net/1721.1/142472 |
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