...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >The role of macrostructural morphology and grain size on the corrosion resistance of Zn and Al castings
【24h】

The role of macrostructural morphology and grain size on the corrosion resistance of Zn and Al castings

机译：宏观组织形态和晶粒尺寸对锌和铝铸件耐蚀性的作用

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

Different macrostructural morphologies and grain sizes may develop due to a wide range of the operational conditions that may exist during casting. It is well known that mechanical properties depend on solidification structures. Particularly, the literature presents relationship between the materials yield strength and grain size or ultimate tensile strength and primary and secondary dendrite arm spacings. It is also reported that the corrosion resistance has been shown to depend strongly on the structural morphology and chemical composition. The aim of this study is to investigate: (a) the influence of columnar and equiaxed structures on the corrosion resistance of aluminium and zinc as-cast samples, (b) the influence of longitudinal (columnar structure) and transversal (pseudo-equiaxed structure) sections of the same sample on the corrosion resistance for both metals and (c) the influence of equiaxed grain size of hot-dip galvanized steel sheets on the corrosion resistance. In order to obtain columnar and equiaxed structures both a vertical upward solidification apparatus and a permanent steel mold casting assembly were used. The corrosion resistance was analyzed by electrochemical impedance spectroscopy technique and Tafel extrapolation method. Corrosion tests were conducted in a 3% NaCl solution at room temperature.
机译：由于铸造过程中可能存在的各种操作条件，可能会形成不同的宏观组织形态和晶粒尺寸。众所周知，机械性能取决于固化结构。特别地，文献提出了材料的屈服强度和晶粒尺寸或极限抗拉强度与初级和次级枝晶臂间距之间的关系。还据报道，耐蚀性在很大程度上取决于结构形态和化学组成。本研究的目的是研究：（a）柱状和等轴结构对铸态铝和锌样品耐蚀性的影响，（b）纵向（柱状结构）和横向（伪等距结构）的影响）同一样品的截面对两种金属的耐蚀性；以及（c）热浸镀锌钢板的等轴晶粒度对耐蚀性的影响。为了获得柱状和等轴结构，既使用垂直向上凝固设备，又使用永久钢铸模组件。用电化学阻抗谱技术和Tafel外推法分析其耐腐蚀性。在室温下在3％NaCl溶液中进行腐蚀测试。

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