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添加劑對AZ91D鎂合金微弧氧化膜的影響
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國家科技支撐計劃項目（2006BAB09B04）


Effects of Electrolyte Additives on the Performance of Micro-Arc Oxide Films on AZ91D Magnesium Alloy
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    摘要:

    鋁酸鈉和氫氧化鈉為主要組元，分別添加蒙脫石、EDTA、阿拉伯樹膠的電解液對AZ91D鎂合金進(jìn)行微弧氧化，并用SEM、EDS、XRD和動電位極化曲線分析其微觀組織結(jié)構(gòu)和耐腐蝕性。結(jié)果表明，3種膜層的表面呈蜂窩狀微觀形貌，陶瓷氧化膜中主要存在相有MgAl2O4、MgO和Mg2SiO4。與AZ91D鎂合金基體相比其耐蝕性均有不同程度提高，其中以蒙脫石添加后膜層的耐蝕效果最好

    Abstract:

    Micro-arc oxide (MAO) films were prepared on AZ91D magnesium alloy in an electrolyte bath of aluminate and sodium hydroxide with different additives such as montmorillonite, EDTA and arabin. The effects of additives on the chemical composition and corrosion resistance of MAO films were examined by means of SEM, EDS, XRD and potentiodynamic polarization in a 3.5% NaCl solution. The results show that the morphology of MAO films is like alveolate, and the microstructure is consisted of MgAl2O4, MgO and Mg2SiO4 phases. Compared with the untreated magnesium alloy, the MAO treated specimen exhibits higher corrosion resistance, especially for the films using montmorillonite as additive

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尚 偉,陳白珍,石西昌,肖 湘.添加劑對AZ91D鎂合金微弧氧化膜的影響[J].稀有金屬材料與工程,2009,38(2):335~338.[Shang Wei, Chen Baizhen, Shi Xichang, Xiao Xiang. Effects of Electrolyte Additives on the Performance of Micro-Arc Oxide Films on AZ91D Magnesium Alloy[J]. Rare Metal Materials and Engineering,2009,38(2):335~338.]
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  • 收稿日期:2008-01-29
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