• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Evaluation of an Al-Zn-Mg-Li alloy/potential candidate as Al-sacrificial anode
【24h】

Evaluation of an Al-Zn-Mg-Li alloy/potential candidate as Al-sacrificial anode

机译：评估Al-Zn-Mg-Li合金/作为Al牺牲阳极的潜在候选材料

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper forms part of an overall effort to develop Al-sacrificial In/Hg free anodes; our research has been directed toward developing Al alloys appropriate for cathodic protection. The Al-Zn-Mg system has been particularly selected due to the presence of precipitates in the α-Al matrix, which are capable of breaking down passive films while presenting good electrochemical efficiencies. At the same time, the effect of Li additions on superficial activation of the anode by means of precipitation of AlLi-type compounds was examined. The microstructure was characterized in the as-cast and as-aged ingots, showing the presence of α-Al dendrites as well as eutectic of Al{sub}2Mg{sub}3Zn{sub}3 and precipitates of Mg{sub}7Zn{sub}3 in interdendritic regions. Electron microscopic observations performed on specimens with and without heat treatments showed in the α-Al matrix the presence of a uniform distribution of precipitates of (τ-Al{sub}2Zn{sub}3Mg{sub}3, Mg{sub}7Zn{sub}3, and δ- AlLi type. The electrochemical behavior of the alloy was investigated in a 3% NaCl solution simulating seawater at room temperature. After evaluation of the electrochemical efficiency, values up to 67% were obtained. The relationship between microstructure and electrochemical efficiency is discussed in this work and suggestions of future research are given in order to improve the electrochemical behavior of Al anodes in the field.
机译：本文是开发Al牺牲In / Hg游离阳极的整体努力的一部分。我们的研究方向是开发适合阴极保护的铝合金。由于在α-Al基体中存在沉淀物，因此特别选择了Al-Zn-Mg系统，该沉淀物能够击穿钝化膜，同时具有良好的电化学效率。同时，研究了添加Li对通过AlLi型化合物的沉淀对阳极的表面活化的影响。在铸态和时效状态的铸锭中对显微组织进行了表征，表明存在Al- {sub} 2Mg {sub} 3Zn {sub} 3的α-Al枝晶和低共熔物，以及Mg {sub} 7Zn {树突间区域中的sub} 3。在经过和不经过热处理的样品上进行的电子显微镜观察表明，在α-Al基体中存在（τ-Al{sub} 2Zn {sub} 3Mg {sub} 3，Mg {sub} 7Zn {在3％NaCl溶液中模拟室温下的海水中，研究了合金的电化学行为，经电化学效率评估，得出的值高达67％。在这项工作中讨论了电化学效率，并提出了进一步研究的建议，以改善铝阳极在该领域的电化学行为。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号