Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy
6xxx series (Al–Mg–Si) alloys are generally known to be greatly susceptible to localized corrosion, which is closely related to the presence of coarse intermetallic compounds (IMCs). In this work, the localized corrosion behaviour of two representative IMCs, namely β-Mg2Si and α-Al(Fe,Mn)Si, were in...
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| Format: | Article |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424002175 |
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| author | Y.H. Gao X.X. Zhang Y. Lv P. Xu Y.F. Zhao Y.P. Zhang C.X. Li G. Liu |
| author_facet | Y.H. Gao X.X. Zhang Y. Lv P. Xu Y.F. Zhao Y.P. Zhang C.X. Li G. Liu |
| author_sort | Y.H. Gao |
| collection | DOAJ |
| description | 6xxx series (Al–Mg–Si) alloys are generally known to be greatly susceptible to localized corrosion, which is closely related to the presence of coarse intermetallic compounds (IMCs). In this work, the localized corrosion behaviour of two representative IMCs, namely β-Mg2Si and α-Al(Fe,Mn)Si, were investigated in a 6082 alloy (Al–Mg–Si–Mn-based). For the β-Mg2Si phase, a rapid de-alloying process is primarily observed. Subsequently, their surface will transform to the electric insulating SiO2 layer, which tends to suppress the further corrosion in its periphery. However, it is found that the α-Al(Fe,Mn)Si phase surprisingly tends to be a potentially effective cathode to promote the initiation of stable localized corrosion, which is contrast with its outstanding corrosion-resistance. Careful examinations reveal that such abnormal corrosion behaviour of α-Al(Fe,Mn)Si is most likely to be relevant to the surface aggregation of Cu impurities, which is clarified by a large number of Cu-rich nanoparticles on its surfaces. |
| first_indexed | 2024-03-08T08:26:40Z |
| format | Article |
| id | doaj.art-a6004794bcdb47e29eb6e2875d3a3767 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:53Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-a6004794bcdb47e29eb6e2875d3a37672024-03-24T06:57:38ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012916751682Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloyY.H. Gao0X.X. Zhang1Y. Lv2P. Xu3Y.F. Zhao4Y.P. Zhang5C.X. Li6G. Liu7School of Aerospace Engineering, North University of China, Taiyuan, 030051, PR China; Shanxi Key Laboratory of Intelligent Equipment Technology in Harsh Environment, North University of China, Taiyuan, 030051, PR China; Corresponding author. School of Aerospace Engineering, North University of China, Taiyuan, 030051, PR China.Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China; Corresponding author.Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR ChinaSchool of Aerospace Engineering, North University of China, Taiyuan, 030051, PR ChinaShanxi Key Laboratory of Intelligent Equipment Technology in Harsh Environment, North University of China, Taiyuan, 030051, PR ChinaKey Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR ChinaSchool of Aerospace Engineering, North University of China, Taiyuan, 030051, PR ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, PR China; Corresponding author.6xxx series (Al–Mg–Si) alloys are generally known to be greatly susceptible to localized corrosion, which is closely related to the presence of coarse intermetallic compounds (IMCs). In this work, the localized corrosion behaviour of two representative IMCs, namely β-Mg2Si and α-Al(Fe,Mn)Si, were investigated in a 6082 alloy (Al–Mg–Si–Mn-based). For the β-Mg2Si phase, a rapid de-alloying process is primarily observed. Subsequently, their surface will transform to the electric insulating SiO2 layer, which tends to suppress the further corrosion in its periphery. However, it is found that the α-Al(Fe,Mn)Si phase surprisingly tends to be a potentially effective cathode to promote the initiation of stable localized corrosion, which is contrast with its outstanding corrosion-resistance. Careful examinations reveal that such abnormal corrosion behaviour of α-Al(Fe,Mn)Si is most likely to be relevant to the surface aggregation of Cu impurities, which is clarified by a large number of Cu-rich nanoparticles on its surfaces.http://www.sciencedirect.com/science/article/pii/S2238785424002175Al-Mg-Si alloyLocalized corrosionIntermetallic compoundsDe-alloying |
| spellingShingle | Y.H. Gao X.X. Zhang Y. Lv P. Xu Y.F. Zhao Y.P. Zhang C.X. Li G. Liu Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy Journal of Materials Research and Technology Al-Mg-Si alloy Localized corrosion Intermetallic compounds De-alloying |
| title | Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy |
| title_full | Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy |
| title_fullStr | Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy |
| title_full_unstemmed | Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy |
| title_short | Distinctive localized corrosion behavior of β-Mg2Si and α-Al(Fe,Mn)Si phases in a 6082 alloy |
| title_sort | distinctive localized corrosion behavior of β mg2si and α al fe mn si phases in a 6082 alloy |
| topic | Al-Mg-Si alloy Localized corrosion Intermetallic compounds De-alloying |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424002175 |
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