| LY12铝合金稀土转化膜的成膜过程 |
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| 引用本文： | 高天柱,李久青.LY12铝合金稀土转化膜的成膜过程[J].北京科技大学学报,2002,24(5):525-528. |
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| 作者姓名： | 高天柱 李久青 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金;59771067; |
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| 摘 要： | 利用Cu/Al电偶对模拟LY12铝合金在铈盐溶液中的成膜过程.电偶对在铈盐溶液中,电偶电流由开始的0.08mA降低为0.005mA,表明有阻滞腐蚀的作用出现;电偶电位随时间负移,这是腐蚀反应中阴极过程受阻滞的表现.浸泡8h后,Cu片上形成了一层黄色膜层.SEM,EDX分析表明,Cu片上形成了富含铈的裂纹状膜层.
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| 关 键 词： | 电偶对 铝合金 稀土转化膜 |
| 修稿时间： | 2001年9月4日 |
Forming Process of Rare Earth Conversion Coatings on LY12 Al Alloy |
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| GAO Tianzhu,LI Jiuqing Material Science and Engineering School,UST Beijing,Beijing ,China.Forming Process of Rare Earth Conversion Coatings on LY12 Al Alloy[J].Journal of University of Science and Technology Beijing,2002,24(5):525-528. |
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| Authors: | GAO Tianzhu LI Jiuqing Material Science and Engineering School UST Beijing Beijing China |
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| Institution: | GAO Tianzhu,LI Jiuqing Material Science and Engineering School,UST Beijing,Beijing 100083,China |
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| Abstract: | A Cu/Al galvanic couple was used to simulate the electrochemical behavior of LY12 aluminum alloy in cerium salt solutions. The galvanic current decreased with time from 0.08 mV to 0.005 mV after immersion in the solutions, which indicates that the corrosion was inhibited. The galvanic potential moved negatively, which shows the cerium film inhibits the cathodic reaction. After 8 h of immersion, a yellow layer was formed on the copper of the galvanic couple. SEM, EDX anslyses show that the layer has a dry mud appearance and contains a mess of Ce. |
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| Keywords: | galvanic couple aluminum alloy rare-earth conversion coating |
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