| 汽车用5052铝-镁合金阳极氧化及封闭工艺的研究 |
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| 引用本文： | 穆伟.汽车用5052铝-镁合金阳极氧化及封闭工艺的研究[J].电镀与环保,2017,37(4). |
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| 作者姓名： | 穆伟 |
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| 作者单位： | 山东劳动职业技术学院,山东济南,250022 |
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| 摘 要： | 使用草酸阳极氧化技术对汽车用5052铝-镁合金进行阳极氧化处理,并研究了阳极氧化对铝-镁合金耐蚀性的影响。铝-镁合金的阳极氧化属于氧化膜的生成和溶解的动态过程。氧化膜主要由多孔层和阻挡层构成,厚度约为8μm。经过阳极氧化处理后,铝-镁合金的耐蚀性显著提高。重铬酸钾封闭后,腐蚀电流密度下降为原来的10%,膜电阻显著增大,进一步提高了铝-镁合金的耐蚀性。
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| 关 键 词： | 铝-镁合金 草酸阳极氧化 耐蚀性 |
Investigation on Anodic Oxidation and Sealing Technology of 5052 Al-Mg Alloy for Automobile |
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| MU Wei.Investigation on Anodic Oxidation and Sealing Technology of 5052 Al-Mg Alloy for Automobile[J].Electroplating & Pollution Control,2017,37(4). |
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| Authors: | MU Wei |
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| Abstract: | 5052 Al-Mg alloy for automobile was treated by using oxalic acid anodic oxidation technology,and the effect of anodic oxidation on the corrosion resistance of Al-Mg alloy was investigated.Anodic oxidation process of Al-Mg alloy was a kind of dynamic state associated with formation and dissolution of oxidation film.The oxidation film was composed of porous layer and barrier layer,its thickness was about 8 μm.The corrosion resistance of Al-Mg alloy improved obviously after anodic oxidation treatment.Sealing with potassium dichromate tended to decrease the corrosion current density to one-tenth of original values and to increase the membrane resistance,which contributed to further improve the corrosion resistance of Al-Mg alloy. |
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| Keywords: | Al-Mg alloy oxalic acid anodic oxidation corrosion resistance |
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