用静态失重法、金相显微镜、扫描电子显微镜等方法研究了不同含量的Sn对Mg-6Al-1.2Y-0.9Nd镁合金的微观组织以及在3.5%NaCl腐蚀介质中的腐蚀速率和表面腐蚀形貌的影响。结果表明，添加1%Sn 时，合金的晶粒得到了明显的细化，组织和成分更加均匀；当Sn含量大于1%时，合金的析出相增多，并出现粗化、偏聚的趋势。在NaCl溶液中，合金的腐蚀速率均随着Sn含量的增加呈现先降低后增加的趋势，其中当Sn含量为1%时合金的腐蚀速率均达到最低，耐蚀性能得到明显地改善。
Effects of Sn addition on corrosion rate of Mg-6Al-1.2Y-0.9Nd magnesium alloy in 3.5% NaCl solution were studied by the static mass-loss tests. The microstructures of the alloys were observed by optical microscope and the morphologies of corrosion surface were analyzed with scanning electron microscopy. The results indicated that with the addtion of 1% Sn, the crystal grain size of the Mg-6Al-1.2Y-0.9Nd magnesium alloy was obviously refined, the microstructure was more homogeneous. But when the addition of Sn is more than 1%, the precipitates increase and they cause the trend of coarsening and segregation. Furthermore, in NaCl solution the corrosion rate of Mg-6Al-1.2Y-0.9Nd magnesium alloy decreases firstly and then increases with the increase of Sn content. With the addtion of 1% Sn, the corrosion rate of the alloy was the lowest, and the corrosion resistance was improved remarkably.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] |
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