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材料工程  2018, Vol. 46 Issue (6): 73-79    DOI: 10.11868/j.issn.1001-4381.2016.001178
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
稀土Gd对AZ31镁合金耐蚀性能的影响
刘军1, 张金玲1,2, 渠治波1, 于彦冲1,2, 许并社1,2, 王社斌1,2
1. 太原理工大学 材料科学与工程学院, 太原 030024;
2. 太原理工大学 新材料界面科学与工程教育部 重点实验室, 太原 030024
Effect of Rare Earth Gd on Corrosion Resistance of AZ31 Magnesium Alloy
LIU Jun1, ZHANG Jin-ling1,2, QU Zhi-bo1, YU Yan-chong1,2, XU Bing-she1,2, WANG She-bin1,2
1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
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摘要 利用失重法研究不同Gd含量的AZ31镁合金在3.5%(质量分数,下同) Na2SO4溶液中的腐蚀行为,并采用OM,SEM和XRD等检测手段分析稀土Gd对AZ31镁合金微观组织、腐蚀速率和腐蚀形貌等的影响。结果表明:稀土Gd的添加能明显改善AZ31镁合金的耐蚀性能,且当Gd的添加量小于4.12%时,合金的耐蚀性能会随着Gd含量的增加而提高,但继续增大Gd含量时合金的耐蚀性能反而会出现一定程度的下降,其原因是合金中添加过多的Gd后,加剧了基体相与析出相之间的微电偶腐蚀,致使合金的耐蚀性能有所下降。故当Gd的添加量为4.12%时,AZ31镁合金的耐蚀性能最佳。
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刘军
张金玲
渠治波
于彦冲
许并社
王社斌
关键词 稀土Gd浸泡实验AZ31镁合金耐蚀性能    
Abstract:The corrosion behavior of AZ31 magnesium alloy with different Gd contents in 3.5%(mass fraction) Na2SO4 solution was investigated by mass loss method. The effect of rare earth Gd on microstructure,corrosion rate and corrosion morphology of AZ31 magnesium alloy was analyzed by optical microscope (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that adding rare earth Gd can improve the corrosion resistance of AZ31 magnesium alloy significantly. When the Gd content is less than 4.12%,the corrosion resistance of the alloy increases with the increase of Gd content, but when the Gd content is more than 4.12%,the corrosion resistance of the alloy declines at a certain degree with the increase of Gd content. This is mainly caused by the content of Gd, which exacerbates the micro-galvanic corrosion effect between the precipitation phase and matrix phase,and thereby results in the decline of the corrosion resistance of the alloy. So when the content of Gd is 4.12%,AZ31 magnesium alloy has the optimum corrosion resistance.
Key wordsrare earth Gd    immersion test    AZ31 magnesium alloy    corrosion resistance
收稿日期: 2016-10-08      出版日期: 2018-06-14
中图分类号:  TG146.2  
通讯作者: 张金玲(1982-),女,副教授,从事镁合金强韧化及腐蚀方面的研究,联系地址:山西省太原市迎泽西大街79号太原理工大学材料科学与工程学院(030024),E-mail:zhjlty@163.com     E-mail: zhjlty@163.com
引用本文:   
刘军, 张金玲, 渠治波, 于彦冲, 许并社, 王社斌. 稀土Gd对AZ31镁合金耐蚀性能的影响[J]. 材料工程, 2018, 46(6): 73-79.
LIU Jun, ZHANG Jin-ling, QU Zhi-bo, YU Yan-chong, XU Bing-she, WANG She-bin. Effect of Rare Earth Gd on Corrosion Resistance of AZ31 Magnesium Alloy. Journal of Materials Engineering, 2018, 46(6): 73-79.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001178      或      http://jme.biam.ac.cn/CN/Y2018/V46/I6/73
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