| 溶胶-凝胶封孔处理后AZ91D镁合金微弧氧化膜的耐蚀性 |
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| 引用本文： | 贾雪梅,柴跃生,孙钢,张敏刚. 溶胶-凝胶封孔处理后AZ91D镁合金微弧氧化膜的耐蚀性[J]. 电镀与涂饰, 2011, 30(7): 44-47 |
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| 作者姓名： | 贾雪梅 柴跃生 孙钢 张敏刚 |
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| 作者单位： | 太原科技大学材料科学与工程学院,山西,太原,030024;山西省镁及镁合金工程技术研究中心,山西,太原,030024 |
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| 摘 要： | 以正硅酸乙酯(TEOS)为前躯体,采用溶胶-凝胶技术在微弧氧化处理的AZ91D镁合金基体表面制备了SiO<,2>封孔涂层.采用热重(TG)、能谱(EDS)和扫描电镜(SEM)对凝胶热性能和涂层的成分及微观形貌进行了分析,并对封孔处理前后的试样进行耐蚀性检测.结果表明,封孔处理后,镁合金耐0.1 mol/L硫酸的时间超过...
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| 关 键 词： | 镁合金 溶胶-凝胶技术 封孔涂层 耐蚀性 热重分析 |
Corrosion resistance of sol-gel sealed micro-arc oxidation coating on AZ91D magnesium alloy |
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| JIA Xue-mei,CHAI Yue-sheng,SUN Gang,ZHANG Min-gang. Corrosion resistance of sol-gel sealed micro-arc oxidation coating on AZ91D magnesium alloy[J]. Electroplating & Finishing, 2011, 30(7): 44-47 |
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| Authors: | JIA Xue-mei CHAI Yue-sheng SUN Gang ZHANG Min-gang |
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| Affiliation: | College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China |
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| Abstract: | A seal coating was prepared on micro-arc oxidized AZ91D magnesium alloy substrate by sol–gel technique using tetraethyl orthosilicate as precursor.The thermal properties of xerogel,composition and morphology of the seal coating were characterized by thermogravimetry(TG),energy-dispersive X-ray spectroscopy(EDS) and scanning electron microscopy(SEM),respectively.The corrosion resistance of the micro-arc oxidized and the sealed magnesium alloy substrate were studied.The results showed that the sealed magnesium alloy endured over 50 min in a 0.1 mol/L H2SO4 solution,and had a self-corrosion potential shifted positively by 50 mV as well as a self-corrosion current density decreased by an order of magnitude in a 3.5wt% NaCl solution,showing good corrosion resistance. |
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| Keywords: | magnesium alloy sol–gel technique seal coating corrosion resistance thermogravimetry |
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