| 镁锂合金无铬阳极氧化工艺 |
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| 引用本文： | 董国君,杨潇薇,王桂香,龚凡.镁锂合金无铬阳极氧化工艺[J].材料保护,2009,42(5). |
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| 作者姓名： | 董国君 杨潇薇 王桂香 龚凡 |
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| 作者单位： | 哈尔滨工程大学材料科学与化学工程学院,超轻材料与表面工程教育部重点实验室,黑龙江,哈尔滨,150001 |
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| 摘 要： | 已有的镁锂合金阳极氧化液舍Cr(Ⅵ),对环境有严重污染.研究了镁锂合金表面阳极氧化成膜工艺,使用无铬环保型电解液得到了有一定耐腐蚀性能的白色氧化膜,分析了电解液中NaOH浓度、氧化时间、电流密度等工艺参数对氧化膜的形成及其耐腐蚀性能的影响.用扫描电镜分析了氧化膜表面形貌,用交流阻抗谱和极化曲线研究了氧化膜的电化学腐蚀行为.结果表明:当电解液组成为50g/L NaOH,40g/LNa2 SiO3·9H2O,20 g/L Na2B4O7·10H2O,40 g/L C6H5Na3O7·2H2O,电流密度为10 mA/cm2,成膜时间为20min时,氧化膜的耐腐蚀性最好;经硅酸盐封孔处理氧化膜耐腐蚀性能得到了进一步提高.
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| 关 键 词： | 阳极氧化 镁锂合金 无铬 耐腐蚀性 |
Study of Chrome-Free Anodizing Process for Magnesium-Lithium Alloys |
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| DONG Guo-jun,YANG Xiao-wei,WANG Gui-xiang,GONG Fan.Study of Chrome-Free Anodizing Process for Magnesium-Lithium Alloys[J].Journal of Materials Protection,2009,42(5). |
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| Authors: | DONG Guo-jun YANG Xiao-wei WANG Gui-xiang GONG Fan |
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| Affiliation: | DONG Guo-jun,YANG Xiao-wei,WANG Gui-xiang,GONG Fan (Key Laboratory of Ministry of Education for Superlight Ma-terials , Surface Technology,Haerbin University of Engineer-ing,Haerbin 150001,China) |
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| Abstract: | Cr-free environmentally friendly process for anodi-zing of Mg - Li alloys was investigated, and white anodizing film was obtained by using Cr-free environmentally acceptable electro-lyte. The effects of various technical parameters, such as the con-centration of NaOH in electrolyte, anodizing time and applied current density on the formation and corrosion resistance of the anodizing film were studied in detail. Moreover, the surface mor-phology of the anodizing film was observed using a scanning elec-tron m... |
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| Keywords: | anodic oxidation Mg-Li alloy Cr-free anodizing corrosion resistance |
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