| 冷却速度对Zn--5 Al--0.1 RE--x Si合金显微组织及耐蚀性能的影响 |
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| 引用本文： | 涂浩,魏大圣,周圣洁,刘亚,吴长军,苏旭平,王建华.冷却速度对Zn--5 Al--0.1 RE--x Si合金显微组织及耐蚀性能的影响[J].北京科技大学学报,2016(8):1132-1138. |
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| 作者姓名： | 涂浩 魏大圣 周圣洁 刘亚 吴长军 苏旭平 王建华 |
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| 作者单位： | 1. 常州大学材料科学与工程学院，常州213164; 常州大学江苏省材料表面科学与技术重点实验室，常州213164;2. 常州大学材料科学与工程学院，常州213164; 常州大学江苏省材料表面科学与技术重点实验室，常州213164; 常州大学江苏省光伏科学与工程协同创新中心，常州213164 |
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| 基金项目： | 国家自然科学基金资助项目(51271040 |
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| 摘 要： | 运用扫描电子显微镜/能谱仪、X射线衍射、盐雾实验、电极化曲线等手段,研究冷却速度和Si对Zn-5Al-0.1RE合金组织及耐蚀性能的影响.结果表明,Zn-5Al-0.1RE-xSi合金由先析出的?-Zn和?-Zn+α-Al共晶组织组成,前者均匀分布在相邻的?-Zn+α-Al共晶胞的边界上.降低冷却速度和Si的加入,均使Zn-5Al-0.1RE-xSi合金单位面积的晶粒增大,晶界减少,合金耐蚀性能提高. Zn-5Al-0.1RE-xSi合金耐蚀性能的差异与合金凝固组织及合金腐蚀产物中Zn5(OH)8Cl2·H2O和ZnO的相对量有关.
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| 关 键 词： | 锌铝合金 冷却速度 微观结构 耐蚀性能 硅 热浸镀锌 |
Effect of cooling rate on the microstructure and corrosion properties of Zn--5Al--0. 1RE--xSi alloys |
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| TU Hao,WEI Da-sheng,ZHOU Sheng-jie,LIU Ya,WU Chang-jun,SU Xu-ping,WANG Jian-hua.Effect of cooling rate on the microstructure and corrosion properties of Zn--5Al--0. 1RE--xSi alloys[J].Journal of University of Science and Technology Beijing,2016(8):1132-1138. |
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| Authors: | TU Hao WEI Da-sheng ZHOU Sheng-jie LIU Ya WU Chang-jun SU Xu-ping WANG Jian-hua |
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| Abstract: | The effects of cooling rate and Si on the microstructure and corrosion property of the Zn-5Al-0. 1RE alloy were studied by scanning electron microscopy-energy dispersive spectrometry, X-ray diffraction, neutral salt spray test and polarization curves. The results show that Zn-5Al-0. 1RE-xSi alloys are composed of primary?-Zn phase and ?-Zn+α-Al eutectic structure, and the former is uniformly distributed on the adjacent ?-Zn+α-Al eutectic cells. The reduction of cooling rate and the addition of Si make the grain size increase and the boundary area per unit alloy area decrease;at the same time, the corrosion resistance is improved. The corrosion resistance of the Zn-5Al-0. 1RE-xSi alloys is dependent on their solidification structure and the relative amount of corrosion products including Zn5 ( OH) 8 Cl2·H2 O and ZnO. |
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| Keywords: | zinc aluminum alloys cooling rate microstructure corrosion resistance silicon hot dip galvanizing |
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