Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition
In this work, the corrosion behaviors of Mg–2Y-xMn (x = 0, 0.5, 1 wt%) alloys in 3.5 wt% NaCl solution were investigated. The hydrogen volume and weight loss after immersion for the same time significantly decreased with increasing Mn content. In addition, the results of the electrochemical tests re...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001796 |
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| author | Jinhang Dong Yuxiu Zhang Jun Liang Zonghui He Xiangbin Li Fei Long |
| author_facet | Jinhang Dong Yuxiu Zhang Jun Liang Zonghui He Xiangbin Li Fei Long |
| author_sort | Jinhang Dong |
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| description | In this work, the corrosion behaviors of Mg–2Y-xMn (x = 0, 0.5, 1 wt%) alloys in 3.5 wt% NaCl solution were investigated. The hydrogen volume and weight loss after immersion for the same time significantly decreased with increasing Mn content. In addition, the results of the electrochemical tests revealed that the Mn-containing alloys had a much lower corrosion current density than the Mg–2Y alloy did, indicating that the addition of Mn effectively reduced the corrosion rate. Specifically, the corrosion rate decreased from 4.91 mm y−1 in the Mg–2Y alloy to 0.81 mm y−1 in the Mg–2Y-0.5Mn alloy and to 0.48 mm y−1 in the Mg–2Y–1Mn alloy. The initial microstructures indicated that grain size, texture and dislocation barely influenced the corrosion behavior; the enhanced corrosion resistance caused by Mn addition could be well understood for two reasons. The first reason was that the addition of Mn obviously decreased the heterogeneity of the overall potential distributions in the form of Mn atoms dissolved in the Mg matrix, which reduced the possibility of galvanic corrosion. The second reason was that the corrosion product films became more stable and compact after the addition of Mn, which was filled by the MnO and MnO2 layers and could effectively retard corrosion attack in the corrosive environment. As a result, the Mn-containing alloys had much better corrosion resistance than the Mg–2Y alloy did and the Mg–2Y–1Mn alloy had the highest corrosion resistance. |
| format | Article |
| id | doaj-art-ac23a9827ae24347834ef56ad9bd8d17 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-ac23a9827ae24347834ef56ad9bd8d172025-01-26T05:03:57ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013518541864Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn additionJinhang Dong0Yuxiu Zhang1Jun Liang2Zonghui He3Xiangbin Li4Fei Long5School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaCorresponding author.; School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaCorresponding author.; School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaCorresponding author. HYPERLINgutzzb@163.com; School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, ChinaIn this work, the corrosion behaviors of Mg–2Y-xMn (x = 0, 0.5, 1 wt%) alloys in 3.5 wt% NaCl solution were investigated. The hydrogen volume and weight loss after immersion for the same time significantly decreased with increasing Mn content. In addition, the results of the electrochemical tests revealed that the Mn-containing alloys had a much lower corrosion current density than the Mg–2Y alloy did, indicating that the addition of Mn effectively reduced the corrosion rate. Specifically, the corrosion rate decreased from 4.91 mm y−1 in the Mg–2Y alloy to 0.81 mm y−1 in the Mg–2Y-0.5Mn alloy and to 0.48 mm y−1 in the Mg–2Y–1Mn alloy. The initial microstructures indicated that grain size, texture and dislocation barely influenced the corrosion behavior; the enhanced corrosion resistance caused by Mn addition could be well understood for two reasons. The first reason was that the addition of Mn obviously decreased the heterogeneity of the overall potential distributions in the form of Mn atoms dissolved in the Mg matrix, which reduced the possibility of galvanic corrosion. The second reason was that the corrosion product films became more stable and compact after the addition of Mn, which was filled by the MnO and MnO2 layers and could effectively retard corrosion attack in the corrosive environment. As a result, the Mn-containing alloys had much better corrosion resistance than the Mg–2Y alloy did and the Mg–2Y–1Mn alloy had the highest corrosion resistance.http://www.sciencedirect.com/science/article/pii/S2238785425001796Magnesium alloysMn additionCorrosionMechanism |
| spellingShingle | Jinhang Dong Yuxiu Zhang Jun Liang Zonghui He Xiangbin Li Fei Long Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition Journal of Materials Research and Technology Magnesium alloys Mn addition Corrosion Mechanism |
| title | Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition |
| title_full | Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition |
| title_fullStr | Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition |
| title_full_unstemmed | Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition |
| title_short | Mechanism analysis of the enhanced corrosion resistance of the Mg–2Y alloy after Mn addition |
| title_sort | mechanism analysis of the enhanced corrosion resistance of the mg 2y alloy after mn addition |
| topic | Magnesium alloys Mn addition Corrosion Mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001796 |
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