Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy
TX31 (Mg-3Sn-1Ca) is an alloy with promising future applications. This study enhances the corrosion resistance of the TX31 alloy through the addition of Zr and Zn and compares the effects of individual Cu addition and Zn/Cu composite addition on the corrosion resistance of the TX31 alloy. This study...
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MDPI AG
2024-12-01
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| author | Zheng Jia Sichao Du Xiaowei Niu |
| author_facet | Zheng Jia Sichao Du Xiaowei Niu |
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| description | TX31 (Mg-3Sn-1Ca) is an alloy with promising future applications. This study enhances the corrosion resistance of the TX31 alloy through the addition of Zr and Zn and compares the effects of individual Cu addition and Zn/Cu composite addition on the corrosion resistance of the TX31 alloy. This study investigates the corrosion properties of TX31 alloys, focusing on the effects of the grain size, second phase, corrosion product film, and texture intensity. The addition of Zr and Zn changed the second-phase area fraction, while Cu introduced a new Mg<sub>2</sub>Cu phase. The TXZ311 alloy (Mg-3Sn-1Ca-1Zn) exhibited the best corrosion resistance, with a corrosion rate as low as 1.68 mm·year<sup>−1</sup>, a significant reduction compared to other alloys. This improvement is attributed to its higher fraction of high-angle grain boundaries (HAGBs) and the enhanced stability of the corrosion product film. The TXK311 alloy (Mg-3Sn-1Ca-1Zr) showed superior corrosion resistance, with a rate of 2.97 mm·year<sup>−1</sup>, due to its uniform and fine grain structure. In contrast, the TX31 alloy had the poorest corrosion resistance, with a corrosion rate of 3.66 mm·year<sup>−1</sup>, due to its bimodal microstructure. The addition of Cu in the TXC311 (Mg-3Sn-1Ca-1Cu) and TXCZ3111 (Mg-3Sn-1Ca-1Cu-1Zn) alloys resulted in micro-galvanic corrosion between α-Mg and Mg<sub>2</sub>Cu, which decreased the corrosion resistance. |
| format | Article |
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| institution | DOAJ |
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| publishDate | 2024-12-01 |
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| spelling | doaj-art-ae6ca306aeb14a00b657ff6b8b4226aa2025-08-20T02:55:32ZengMDPI AGCrystals2073-43522024-12-011412109810.3390/cryst14121098Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca AlloyZheng Jia0Sichao Du1Xiaowei Niu2College of Mechanical Engineering, Shenyang University, Shenyang 110044, ChinaCollege of Mechanical Engineering, Shenyang University, Shenyang 110044, ChinaCollege of Environment, Liaoning Province Pollution Environmental Remediation Professional Technology Innovation Center & Shenyang Key Laboratory of Collaborative Technology Innovation for Industrial Pollution Reduction and Carbon Reduction, Shenyang University, Shenyang 110044, ChinaTX31 (Mg-3Sn-1Ca) is an alloy with promising future applications. This study enhances the corrosion resistance of the TX31 alloy through the addition of Zr and Zn and compares the effects of individual Cu addition and Zn/Cu composite addition on the corrosion resistance of the TX31 alloy. This study investigates the corrosion properties of TX31 alloys, focusing on the effects of the grain size, second phase, corrosion product film, and texture intensity. The addition of Zr and Zn changed the second-phase area fraction, while Cu introduced a new Mg<sub>2</sub>Cu phase. The TXZ311 alloy (Mg-3Sn-1Ca-1Zn) exhibited the best corrosion resistance, with a corrosion rate as low as 1.68 mm·year<sup>−1</sup>, a significant reduction compared to other alloys. This improvement is attributed to its higher fraction of high-angle grain boundaries (HAGBs) and the enhanced stability of the corrosion product film. The TXK311 alloy (Mg-3Sn-1Ca-1Zr) showed superior corrosion resistance, with a rate of 2.97 mm·year<sup>−1</sup>, due to its uniform and fine grain structure. In contrast, the TX31 alloy had the poorest corrosion resistance, with a corrosion rate of 3.66 mm·year<sup>−1</sup>, due to its bimodal microstructure. The addition of Cu in the TXC311 (Mg-3Sn-1Ca-1Cu) and TXCZ3111 (Mg-3Sn-1Ca-1Cu-1Zn) alloys resulted in micro-galvanic corrosion between α-Mg and Mg<sub>2</sub>Cu, which decreased the corrosion resistance.https://www.mdpi.com/2073-4352/14/12/1098TX31 alloymicrostructurecorrosion propertiescorrosion product film |
| spellingShingle | Zheng Jia Sichao Du Xiaowei Niu Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy Crystals TX31 alloy microstructure corrosion properties corrosion product film |
| title | Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy |
| title_full | Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy |
| title_fullStr | Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy |
| title_full_unstemmed | Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy |
| title_short | Effect of Zr, Zn, and Cu on Corrosion Resistance of As-Extruded Mg-3Sn-1Ca Alloy |
| title_sort | effect of zr zn and cu on corrosion resistance of as extruded mg 3sn 1ca alloy |
| topic | TX31 alloy microstructure corrosion properties corrosion product film |
| url | https://www.mdpi.com/2073-4352/14/12/1098 |
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