Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys
The corrosion behavior of soluble Mg–Gd-based alloys was systematically investigated by analyzing two key aspects: environmental factors and microstructural characteristics. Environmental influences were evaluated using immersion weight loss tests under varying Cl<sup>−</sup> concentrati...
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2025-01-01
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| author | Qinghua Wang Zhiquan Huang Yanchun Zhu Ling Qin Jingfeng Zou Lifeng Ma |
| author_facet | Qinghua Wang Zhiquan Huang Yanchun Zhu Ling Qin Jingfeng Zou Lifeng Ma |
| author_sort | Qinghua Wang |
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| description | The corrosion behavior of soluble Mg–Gd-based alloys was systematically investigated by analyzing two key aspects: environmental factors and microstructural characteristics. Environmental influences were evaluated using immersion weight loss tests under varying Cl<sup>−</sup> concentrations and temperature conditions. From a microstructural perspective, the study examined the impact of different initial microstructural morphologies on corrosion performance. The second-phase compound Mg<sub>5</sub>Gd, formed in alloys prepared via melting, was subjected to both immersion weight loss and electrochemical testing. The results demonstrated that corrosion rates increased with higher Cl<sup>−</sup> concentrations and elevated temperatures, albeit in a nonlinear manner. Notably, significant effects on corrosion rates were observed in the Cl<sup>−</sup>concentration range of 1% to 3% and at temperatures between 75 °C and 100 °C. Additionally, the dissolution rate of the alloy increased markedly from 8.37 mg/cm<sup>2</sup>/h in the as-cast state to 43.85 mg/cm<sup>2</sup>/h following extrusion combined with perforation deformation. Microstructural analysis revealed that the extrusion process disrupted the coarse, reticulated second-phase structure observed in the as-cast state, thereby diminishing its corrosion-inhibiting properties. Electrochemical testing further confirmed that the Mg<sub>5</sub>Gd second phase, formed through the incorporation of the rare-earth element Gd, exhibited high electrochemical activity. |
| format | Article |
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| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-af937670cc5d4d7d9828410b025b25de2025-01-24T13:41:28ZengMDPI AGMetals2075-47012025-01-011513510.3390/met15010035Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium AlloysQinghua Wang0Zhiquan Huang1Yanchun Zhu2Ling Qin3Jingfeng Zou4Lifeng Ma5School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaDepartment of Engineering, University of Hull, Cottingham Rd, Hull HU6 7RX, UKSchool of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaThe corrosion behavior of soluble Mg–Gd-based alloys was systematically investigated by analyzing two key aspects: environmental factors and microstructural characteristics. Environmental influences were evaluated using immersion weight loss tests under varying Cl<sup>−</sup> concentrations and temperature conditions. From a microstructural perspective, the study examined the impact of different initial microstructural morphologies on corrosion performance. The second-phase compound Mg<sub>5</sub>Gd, formed in alloys prepared via melting, was subjected to both immersion weight loss and electrochemical testing. The results demonstrated that corrosion rates increased with higher Cl<sup>−</sup> concentrations and elevated temperatures, albeit in a nonlinear manner. Notably, significant effects on corrosion rates were observed in the Cl<sup>−</sup>concentration range of 1% to 3% and at temperatures between 75 °C and 100 °C. Additionally, the dissolution rate of the alloy increased markedly from 8.37 mg/cm<sup>2</sup>/h in the as-cast state to 43.85 mg/cm<sup>2</sup>/h following extrusion combined with perforation deformation. Microstructural analysis revealed that the extrusion process disrupted the coarse, reticulated second-phase structure observed in the as-cast state, thereby diminishing its corrosion-inhibiting properties. Electrochemical testing further confirmed that the Mg<sub>5</sub>Gd second phase, formed through the incorporation of the rare-earth element Gd, exhibited high electrochemical activity.https://www.mdpi.com/2075-4701/15/1/35corrosion behaviorimmersion weight losssecond phasetrial electrochemical testsdissolution ratecorrosion mechanism |
| spellingShingle | Qinghua Wang Zhiquan Huang Yanchun Zhu Ling Qin Jingfeng Zou Lifeng Ma Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys Metals corrosion behavior immersion weight loss second phase trial electrochemical tests dissolution rate corrosion mechanism |
| title | Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys |
| title_full | Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys |
| title_fullStr | Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys |
| title_full_unstemmed | Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys |
| title_short | Study of Corrosion Behavior of Mg–Gd-Based Soluble Magnesium Alloys |
| title_sort | study of corrosion behavior of mg gd based soluble magnesium alloys |
| topic | corrosion behavior immersion weight loss second phase trial electrochemical tests dissolution rate corrosion mechanism |
| url | https://www.mdpi.com/2075-4701/15/1/35 |
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