| Mg2B2O5晶须增强AZ91D镁基复合材料在Cl-溶液中腐蚀行为* |
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| 引用本文： | 王晓民,喇培清,程楚,张廷安.Mg2B2O5晶须增强AZ91D镁基复合材料在Cl-溶液中腐蚀行为*[J].盐湖研究,2017,25(3):61-66. |
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| 作者姓名： | 王晓民 喇培清 程楚 张廷安 |
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| 作者单位： | 青海大学机械工程学院青海省新型轻合金重点实验室,青海 西宁 810016,青海大学机械工程学院青海省新型轻合金重点实验室,青海 西宁 810016,东北大学材料与冶金学院多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110004,东北大学材料与冶金学院多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110004 |
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| 基金项目： | 青海省自然基金项目(项目号2014-ZJ-781) |
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| 摘 要： | 用电化学方法测量了Mg_2B_2O_5晶须增强AZ91D镁基复合材料在3.5%NaCl溶液中的开路电位、动电位极化曲线和交流阻抗,研究了晶须体积分数对镁合金基体耐腐蚀性能的影响,并利用SEM和XRD表征了腐蚀后复合材料表面的微观形貌和相组成。结果表明,随着Mg_2B_2O_5晶须体积分数的增加,AZ91D镁基复合材料的耐腐蚀性逐渐提高。当硼酸镁晶须的体积分数为35%时,材料的自腐蚀电位提高0.2V以上,自腐蚀流密度降低了1个数量级;SEM测试表明,复合材料表面生成了一层晶须增韧的腐蚀钝化膜,对基体起到保护作用。
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| 关 键 词： | Mg_2B_2O_5晶须 镁基复合材料 电化学腐蚀 耐蚀性 腐蚀膜 |
| 收稿时间： | 2016/3/31 0:00:00 |
| 修稿时间： | 2016/5/18 0:00:00 |
Corrosion Behavior of Mg2B2O5 Whisker Content on AZ91D Magnesium Matrix Composites in Cl- Solution |
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| WANG Xiao-min,LA Pei-qing,CHENG Chu and ZHANG Ting-an.Corrosion Behavior of Mg2B2O5 Whisker Content on AZ91D Magnesium Matrix Composites in Cl- Solution[J].Journal of Salt Lake Research,2017,25(3):61-66. |
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| Authors: | WANG Xiao-min LA Pei-qing CHENG Chu and ZHANG Ting-an |
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| Institution: | Key Laboratory of Qinghai Province for Light Alloy, School of Mechanical Engineering, Qinghai University, Xining, 810016,China,Key Laboratory of Qinghai Province for Light Alloy, School of Mechanical Engineering, Qinghai University, Xining, 810016,China,Key Laboratory of Ecological Mettallurgy of Multimetal Intergrown Ores of Ministry of Education,School of Materials and Metallurgy, Northeast University, Shenyang, 110004, China and Key Laboratory of Ecological Mettallurgy of Multimetal Intergrown Ores of Ministry of Education,School of Materials and Metallurgy, Northeast University, Shenyang, 110004, China |
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| Abstract: | :The open circuit potential tests, potentiodynamic polarization curves and electrochemical impedance spectrum(EIS) of Mg2B2O5w/AZ91D magnesium matrix composites in 3.5% NaCl solution were investigated by the electrochemical method and the impact of the whisker volume fraction on the corrosion resistance of magnesium matrix composites studied. The surface morphology and the phase composition of the composite after corrosion test were characterized by SEM and XRD. The results show that the corrosion resistance of AZ91D magnesium matrix composites is improved gradually with the increase of the volume fraction of Mg2B2O5 whisker. When the volume fraction of magnesium borate whisker was 35%, the corrosion potential of the matrix composite material increases by 0.2 V, and the corrosion current density decreases an order of magnitude. SEM tests indicate that the surface of the composite material produces a layer of whisker toughened by the corrosion passivation film, which shows a protective effect on the substrate. |
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| Keywords: | Magnesium borate whisker Magnesium matrix composite Electrochemical corrosion Corrosion resistance Corrosion film |
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