| Zr含量对Mg-3Zn-1Y合金显微组织和腐蚀行为的影响 |
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| 引用本文： | 黄涛,许春香,杨丽景,李福霞,贾庆功,宽军,张正卫,武晓峰,王中琪.Zr含量对Mg-3Zn-1Y合金显微组织和腐蚀行为的影响[J].中国腐蚀与防护学报,2021(2):219-225. |
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| 作者姓名： | 黄涛 许春香 杨丽景 李福霞 贾庆功 宽军 张正卫 武晓峰 王中琪 |
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| 作者单位： | 太原理工大学材料科学与工程学院;中国科学院宁波材料技术与工程研究所 |
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| 基金项目： | 国家自然科学基金(51574175和51474153);宁波科技创新2025重大专项(2019B10104)。 |
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| 摘 要： | 采用传统重力铸造法制备了Mg-3Zn-1Y-x Zr(x=0,0.2,0.4,0.6)合金,并通过光学显微镜(OM)、扫描电镜(SEM)、失重和电化学实验研究了Zr含量对Mg-3Zn-1Y显微组织和腐蚀行为的影响。结果表明:Mg-3Zn-1Y主要由α-Mg基质和Mg3YZn6(I)相组成,Zr的加入没有改变第二相的类型。Zr能显著细化晶粒,优化组织结构,提升合金耐腐蚀性。同时,Zr能提升合金基体腐蚀电位,减小腐蚀电流密度,抑制合金腐蚀。失重结果表明,Mg-3Zn-1Y-0.6Zr具有最佳的耐腐蚀性能,达到(0.325±0.042)mm/a。
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| 关 键 词： | Zr 显微组织 腐蚀行为 晶粒细化 失重 |
Effect of Zr Addition on Microstructure and Corrosion Behavior of Mg-3Zn-1Y Alloys |
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| HUANG Tao,XU Chunxiang,YANG Lijing,LI Fuxia,JIA Qinggong,KUAN Jun,ZHANG Zhengwei,WU Xiaofeng,WANG Zhongqi.Effect of Zr Addition on Microstructure and Corrosion Behavior of Mg-3Zn-1Y Alloys[J].Journal of Chinese Society For Corrosion and Protection,2021(2):219-225. |
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| Authors: | HUANG Tao XU Chunxiang YANG Lijing LI Fuxia JIA Qinggong KUAN Jun ZHANG Zhengwei WU Xiaofeng WANG Zhongqi |
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| Affiliation: | (College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030000,China;Key Laboratory of Marine Materials and Related Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315000,China) |
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| Abstract: | Mg-3 Zn-1 Y-x Zr(x=0, 0.2, 0.4, 0.6) alloys are prepared by traditional gravity casting. The influence of Zr amount on the microstructure and corrosion behavior of Mg-3 Zn-1 Y alloys is systematically investigated via optical microscope(OM), scanning electron microscope(SEM), mass loss testing and electrochemical testing. Results show that the Mg-3 Zn-1 Y alloy is mainly composed of α-Mg matrix and Mg3 YZn6(I) phase. The addition of Zr does not change the type of the second phase, while can remarkably refine the grains by increasing nucleation rate, optimize the structure and improve the corrosion resistance of Mg-3 Zn-1 Y alloys. Meanwhile, the addition of Zr can increase the corrosion potential of alloy substrate, reduce the corrosion current density, thereby decreasing the tendency of corrosion and inhibiting the corrosion. The mass loss results indicate that the Mg-3 Zn-1 Y-0.6 Zr alloy has the best corrosion resistance with corrosion rate of(0.325±0.042) mm/a. |
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| Keywords: | Zr microstructure corrosion behavior grain refinement mass loss |
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