| 6061 铝合金表面无铬稀土镧转化膜性能的研究 |
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| 引用本文： | 李红玲,刘清玲.6061 铝合金表面无铬稀土镧转化膜性能的研究[J].表面技术,2013,42(3):42-45,55. |
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| 作者姓名： | 李红玲 刘清玲 |
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| 作者单位： | 新乡学院化学与化工学院 |
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| 基金项目： | 河南省科技攻关重点项目(122102310321) |
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| 摘 要： | 利用极化曲线方法,研究了以La(NO3)3.6H2O为促进剂的磷酸盐转化膜的耐蚀性,同时与铬磷化膜及无稀土促进的单纯磷酸盐膜的耐蚀性进行了对比;通过划格法和全浸腐蚀试验,研究了这三种转化膜与有机涂层间的结合力。结果发现:与单纯磷酸盐膜相比,稀土促进生成的磷酸盐膜中的传输阻力增加,耐蚀性明显增强,而与铬磷化膜相比,二者在弱极化区的耐蚀性能相近;稀土促进生成的磷酸盐膜与有涂层间的结合力明显优于铬磷化膜。
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| 关 键 词： | 铝合金 转化膜 无铬 稀土 耐蚀性 结合力 |
| 收稿时间： | 2013/1/24 0:00:00 |
| 修稿时间： | 2013/2/15 0:00:00 |
Research on Performance of Chrome-free Rare Earth Lanthanum Conversion Coating on 6061 Aluminum Alloy Surface |
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| LI Hong-ling and LIU Qing-ling.Research on Performance of Chrome-free Rare Earth Lanthanum Conversion Coating on 6061 Aluminum Alloy Surface[J].Surface Technology,2013,42(3):42-45,55. |
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| Authors: | LI Hong-ling and LIU Qing-ling |
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| Affiliation: | (Chemistry and Chemical Industry Academy,Xinxiang Normal College,Xinxiang 453000,China) |
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| Abstract: | The anti-corrosion of the conversion coating which is formed by La( NO3)3 ·6 H2O was evaluated with polarization curve, and also compared the chromium phosphate film and non-rare phosphate conversion coating. Adhesion force between the conversion coatings and the organic coating were studied through crossing grid method and immersing corrosion test .The results showed that the transmission resistance of conversion coating with rare earth additive was increased by comparing with non-rare phosphate conversion coating; The anti-corrosion of the conversion coating was increased noticeably. But comparing with chromium phosphting, in the weak polarized scope, both of the corrosion resistances were close. Adhesion force between the conversion coating with rare earth as additive and the organic coating was obviously superior to that of chromate phosphate process. |
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| Keywords: | aluminum alloy conversion coating chrome-free rare earth corrosion resistance adhension |
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