• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of University of Kuwait >Corrosion and passivation behaviour of Al, Al-Cu, Al-6061 and Al-7075 in nitric acid and nitric acid-containing chloride solutions
【24h】

Corrosion and passivation behaviour of Al, Al-Cu, Al-6061 and Al-7075 in nitric acid and nitric acid-containing chloride solutions

机译：Al，Al-Cu，Al-6061和Al-7075在硝酸和含硝酸的氯化物溶液中的腐蚀和钝化行为

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

Due to the technological importance of Aluminium (Al) and its alloys and the wide industrial applications of these materials, the electrochemical behaviour of naturally passivated aluminium and aluminium alloys (Al-Cu, Al-6061 and Al-7075) was investigated in nitric acid and nitric acid-containing chloride solutions. The effect of concentration of the ambient electrolyte on the corrosion behaviour of these materials was traced. Electrochemical impedance spectroscopy (EIS) and polarization techniques were used. The 6061 alloy was found to be the most corrosion resistant even in the presence of chloride ions up to 0.35 M. The native oxide film present on Al or its alloys is too thin to impart complete passivity. An equilibrium occurs between barrier film dissolution and surface passivation especially in dilute solutions ( ≤ 0.1 M HNO_3). The electrode/ electrolyte interface was fitted to a parallel resistor/capacitor model using a fitting program to fit the experimental impedance data to computer-generated data according to the proposed model. The fitting results revealed that the barrier layer on Al and Al-6061 behaves like a perfect dielectric. The barrier layer on Al-Cu and Al-7075 alloys deviate from ideal capacitor behaviour.
机译：由于铝及其合金的技术重要性以及这些材料在工业上的广泛应用，因此对天然钝化的铝和铝合金（Al-Cu，Al-6061和Al-7075）在硝酸中的电化学行为进行了研究。和含硝酸的氯化物溶液。追踪环境电解质浓度对这些材料的腐蚀行为的影响。使用了电化学阻抗谱（EIS）和极化技术。发现即使在存在高达0.35 M的氯离子的情况下，6061合金也是最耐腐蚀的。存在于Al或其合金上的天然氧化膜太薄，无法提供完全的钝化性。阻挡膜溶解和表面钝化之间会出现平衡，尤其是在稀溶液（≤0.1 M HNO_3）中。使用拟合程序将电极/电解质界面拟合为并联电阻器/电容器模型，以根据建议的模型将实验阻抗数据拟合为计算机生成的数据。拟合结果表明，Al和Al-6061上的势垒层表现得像完美的电介质。 Al-Cu和Al-7075合金上的势垒层偏离了理想的电容器性能。

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