稀土Gd对AZ31镁合金耐蚀性能的影响
Effect of Rare Earth Gd on Corrosion Resistance of AZ31Magnesium Alloy
查看参考文献23篇
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文摘
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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)Na_2SO_4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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其他语种文摘
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The corrosion behavior of AZ31magnesium alloy with different Gd contents in 3.5%(mass fraction)Na_2SO_4solution was investigated by mass loss method.The effect of rare earth Gd on microstructure, corrosion rate and corrosion morphology of AZ31magnesium 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 AZ31magnesium 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%,AZ31magnesium alloy has the optimum corrosion resistance. |
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来源
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材料工程
,2018,46(6):73-79 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2016.001178
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关键词
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稀土Gd
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浸泡实验
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AZ31镁合金
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耐蚀性能
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地址
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1.
太原理工大学材料科学与工程学院, 太原, 030024
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金项目
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山西省自然科学基金
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文献收藏号
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CSCD:6262423
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