| Zn对均匀化态Mg-3Sn-Ca镁合金腐蚀性能的影响 |
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| 引用本文： | 贾征,喻兵,付丽.Zn对均匀化态Mg-3Sn-Ca镁合金腐蚀性能的影响[J].稀有金属材料与工程,2023,52(2):568-574. |
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| 作者姓名： | 贾征 喻兵 付丽 |
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| 作者单位： | 沈阳大学机械工程学院,沈阳大学机械工程学院,沈阳大学机械工程学院 |
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| 基金项目： | 辽宁省教育厅重点资助项目(项目号：LJKZ1171),中国博士后基金(2020M680978),辽宁省博士启动(2020-BS-260)。 |
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| 摘 要： | 研究了Zn元素对均匀化态Mg-3Sn-Ca合金耐腐蚀性能的影响。通过XRD、金相、SEM、失重、析氢、电化学极化曲线和阻抗谱分析了Mg-3Sn-Ca(TX31)和Mg-3Sn-Ca-Zn(TXZ311)2种合金的耐蚀性能。结果表明,Mg-3Sn-Ca合金中主要由CaMgSn及Mg2Sn相组成,加入Zn元素后晶粒得到显著细化,第二相体积分数增加并呈弥散分布,并有Mg2Ca相析出。而Zn的添加可显著提高Mg-3Sn-Ca合金的耐蚀性能,这主要归因于TXZ311合金具有更细小的晶粒尺寸以及均匀密集分布的CaMgSn相,使合金在腐蚀过程中形成的钝化膜更加均匀。因此,TXZ311合金的耐蚀性远高于TX31合金。
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| 关 键 词： | Mg-3Sn-Ca合金 Mg-3Sn-Ca-Zn合金 均匀化 CaMgSn相 耐腐蚀性能 |
| 收稿时间： | 2021/12/31 0:00:00 |
| 修稿时间： | 2022/3/1 0:00:00 |
Effect of Zn on corrosion properties of homogenized Mg-3Sn-Ca magnesium alloy |
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| Jia Zheng,Yu Bing and Fu Li.Effect of Zn on corrosion properties of homogenized Mg-3Sn-Ca magnesium alloy[J].Rare Metal Materials and Engineering,2023,52(2):568-574. |
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| Authors: | Jia Zheng Yu Bing and Fu Li |
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| Affiliation: | School of Mechanical Engineering,Shenyang University,School of Mechanical Engineering,Shenyang University,School of Mechanical Engineering,Shenyang University |
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| Abstract: | Effect of Zn on the corrosion properties of homogenized Mg-3Sn-Ca alloy was investigated in this paper. The second phase is composed of CaMgSn and Mg2Sn in the Mg-3Sn-Ca alloy. The grains are significantly refined by the addition of Zn. The volume fraction of the second phases increase and exist dispersed distribution. Mg2Ca phase is precipitated. In addition, the corrosion rate of Mg-3Sn-Ca(TX31)and Mg-3Sn-Ca-Zn(TXZ311)alloys were analyzed by immersion and hydrogen evolution test. The corrosion resistance of TX31 and TXZ311 alloys was analyzed by electrochemical polarization curves and impedance spectroscopy. The results show that TXZ311 alloy has smaller grain size, more uniform distribution CaMgSn phases and more dense corrosion film, which cause the higher corrosion resistance of TZX311 alloy. |
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| Keywords: | Mg-3Sn-Ca alloy Mg-3Sn-Ca-Zn alloy homogenization CaMgSn phase corrosion properties |
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