• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Eurocorr 2004 >Corrosion and oxidation of new Magnesium alloys for automotiveapplications
【24h】

Corrosion and oxidation of new Magnesium alloys for automotiveapplications

机译：用于汽车的新型镁合金的腐蚀和氧化

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Corrosion performance of sand cast magnesium alloy Mg-RE-Zr after agingtreatments at 250 ℃ was investigated in 3.5% NaCl solution saturated with Mg(OH)2,(pH = 10.5) using potentiodynamic polarization, immersion rsion and auger microscopy.Microstructures have been carried out on Mg-RE-Zr alloy in different thermal states.The central zirconium-rich areas within the grains of the alloy micro structure weremore corrosion resistant than the outer zirconium-depleted areas of the grains.Based on the analyses of the corrosion process, polarization behaviors and themicrostructure of these alloy, it is postulated that zirconium acts in a number of waysto improve corrosion resistance. Zirconium stabilises the solid solution and makes itinactive in anodic dissolution, significantly passivates the precipitated particlesreducing cathodic hydrogen evolution and increases the barrier effect of the grainboundary phase through a finer grain size and thus a more continuous layer of thegrain boundary phase.
机译：利用电势极化，浸没扭转和螺旋钻显微镜研究了铸镁合金Mg-RE-Zr在3.5％NaCl溶液中（Mg（OH）2，（pH = 10.5）饱和）在250℃时效后的腐蚀性能。在不同的热态下对Mg-RE-Zr合金进行了研究。合金微结构晶粒内的中心富锆区比晶粒外的贫锆区具有更强的耐腐蚀性。基于腐蚀过程的分析，极化行为和这些合金的微观结构，推测锆以多种方式起作用以提高耐蚀性。锆可稳定固溶体并使之在阳极溶解中失活，可显着钝化沉淀的颗粒，从而减少阴极氢的逸出，并通过更细的晶粒尺寸和因此更连续的晶粒边界相层增加晶界相的阻挡作用。

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