| U表面Al及Ti/Al双重镀层的电化学腐蚀行为 |
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| 引用本文： | 王庆富,鲜晓斌,刘清和,郎定木.U表面Al及Ti/Al双重镀层的电化学腐蚀行为[J].原子能科学技术,2006,40(6):662-666. |
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| 作者姓名： | 王庆富 鲜晓斌 刘清和 郎定木 |
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| 作者单位： | 表面物理与化学国家重点实验室，四川 ;绵阳 ;621907 |
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| 摘 要： | 采用动电位极化技术和扫描电镜(SEM)对U表面Al及Ti/Al双重镀层在含50μg/gCl－的KCl溶液中的电化学腐蚀行为进行研究。研究结果表明：U表面Al镀层和Ti/Al双重镀层的腐蚀为局部腐蚀，其腐蚀速度明显低于裸体U，能够对U表面提供较好的保护。Al镀层相对U基体为阳极性镀层，能对U基体提供牺牲性保护；Ti镀层相对U基体为阴极性镀层，对U基体的保护是基于镀层对腐蚀介质的物理屏障作用。
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| 关 键 词： | U Al镀层 Ti/Al双重镀层 电化学腐蚀 |
| 文章编号： | 1000-6931（2006）06-0662-05 |
| 收稿时间： | 2005-03-09 |
| 修稿时间： | 2005-03-092005-06-17 |
Electrochemical Corrosion Behaviors of Aluminium and Titanium/Aluminium Dual Coatings on Uranium Surface |
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| WANG Qing-fu,XIAN Xiao-bin,LIU Qing-he,LANG Ding-mu.Electrochemical Corrosion Behaviors of Aluminium and Titanium/Aluminium Dual Coatings on Uranium Surface[J].Atomic Energy Science and Technology,2006,40(6):662-666. |
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| Authors: | WANG Qing-fu XIAN Xiao-bin LIU Qing-he LANG Ding-mu |
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| Affiliation: | National Key Laboratory of Surface Physics and Chemistry, ;P.O. Box 718-35, Mianyang 621907, China ; |
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| Abstract: | The electrochemical corrosion behaviors of aluminium and titanium/aluminium dual coatings on uranium surface，in 50 μg/g Cl－ potassium chloride solution,were studied by potentiodynamic polarization and scanning electron microscopy (SEM). The corrosion characteristics of aluminium and titanium/ aluminium dual coatings on uranium surface are local corrosion, the corrosion rate of these coatings is evidently lower than that of uncoated uranium, and these coatings can provide good protection for uranium substrate. The aluminium is anodic coating to uranium，and offers sacrificial protection for uranium substrate. The titanium is cathodic coating to uranium，it’s protection for uranium substrate is based on physical barrier to corrosion medium. |
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| Keywords: | uranium aluminium coating titanium/aluminium dual coatings electrochemical corrosion |
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