| 李明,李敏伟,马英,傅耘.电镀Cd层在海洋大气环境中的腐蚀行为研究[J].装备环境工程,2013,10(1):33-37. LI Ming,LI Min-wei,MA Ying,FU Yun.Study of Cadmium Electroplates′Corrosion Behavior in Marine Atmosphere[J].Equipment Environmental Engineering,2013,10(1):33-37. |
| 电镀Cd层在海洋大气环境中的腐蚀行为研究 |
| Study of Cadmium Electroplates′Corrosion Behavior in Marine Atmosphere |
| 投稿时间：2012-08-06 修订日期：2013-01-01 |
| DOI： |
| 中文关键词: 电镀Cd层 海洋大气 含Cr钝化膜 腐蚀产物膜 交流阻抗谱 |
| 英文关键词:Cd electroplate marine atmosphere passive film with Cr corrosion product film EIS |
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| 中文摘要: |
| 通过自然暴露试验，研究了航空钢结构常用的电镀Cd层在我国南部热带海洋大气环境中的腐蚀行为。采用扫描电子显微镜（SEM）观察了电镀Cd层的表面微观结构和腐蚀形貌；采用电化学交流阻抗谱（EIS）表征了电镀Cd层在腐蚀介质中的表面细微结构及其在自然暴露过程中的变化规律，分析了镀Cd层在海洋大气环境中的腐蚀过程和腐蚀机理。研究发现，电镀Cd层在海洋大气环境中的腐蚀主要包括含Cr钝化膜的局部破损和镀层本身的腐蚀两个方面，电镀Cd层的腐蚀产物膜能够有效抑制腐蚀扩展。相对于近海户外大气环境，海洋平台户外的高湿度和高盐分大气环境对含Cr钝化膜的穿透性更强，对镀Cd层的腐蚀更加严重。 |
| 英文摘要: |
| The corrosion behavior of Cd electroplates in marine atmosphere of south China was studied by natural environmental test. The surface and corrosion morphology of Cd electroplates was examined by scanning electron microscopy (SEM). The micro-structures of Cd electroplate and their changes during natural exposure were characterized and analyzed by using electrochemical impedance spectroscopy (EIS). The corrosion mechanism of Cd electroplate in marine atmosphere was analyzed. It was founded that localized breaking of passive films with Cr and corrosion of Cd electroplate base are involved in the whole process. The Cd corrosion product film can restrain corrosion′s extending effectively. Compared to the open air near the coast,outdoor of marine platform with higher humidity and salt can penetrate the passive films with Cr more easily, causing Cd electroplates more serious corrosion. |
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