| 镁合金AZ91D无铬磷化膜的形貌及其耐蚀性能 |
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| 引用本文： | 崔学军,刘春海,杨瑞嵩,林修洲,龚敏.镁合金AZ91D无铬磷化膜的形貌及其耐蚀性能[J].腐蚀与防护,2012(5):394-396. |
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| 作者姓名： | 崔学军 刘春海 杨瑞嵩 林修洲 龚敏 |
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| 作者单位： | 四川理工学院材料与化学工程学院;材料腐蚀与防护四川省重点实验室 |
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| 基金项目： | 四川理工学院人才引进基金(No.2011RC02);腐蚀与防护四川省重点实验室基金(No.2011CL08;No.2011CL01) |
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| 摘 要： | 以磷酸盐、植酸为主要成分,通过化学沉积的方法在镁合金AZ91D表面获得了无铬磷化膜。经SEM分析表明,膜层存在均匀微裂纹,膜厚为6～10μm;中性盐雾试验,磷化样品72h未见腐蚀现象;电化学极化曲线测试,磷化后镁合金的Ecorr比未处理的正移150mV,Jcorr降低了3个数量级,分析结果进一步证实,磷化膜有效地提高了镁合金AZ91D的耐蚀性能。
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| 关 键 词： | 镁合金 磷酸盐转化膜 植酸 无铬膜 |
Morphology and Corrosion Resistance of Chrome-free Phosphate Film for AZ91D Magnesium Alloy |
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| CUI Xue-jun,LIU Chun-hai,YANG Rui-song,LIN Xiu-zhou,GONG Min.Morphology and Corrosion Resistance of Chrome-free Phosphate Film for AZ91D Magnesium Alloy[J].Corrosion & Protection,2012(5):394-396. |
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| Authors: | CUI Xue-jun LIU Chun-hai YANG Rui-song LIN Xiu-zhou GONG Min |
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| Affiliation: | 1,2(1.College of Materials and Chemical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China; 2.Material Corrosion and Protection Key Laboratory of Sichuan Province,Zigong 643000,China) |
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| Abstract: | A chrome-free phosphate film was prepared on the AZ91D magnesium alloy surface via chemical deposition method.The morphology of surface and interface was examined using scanning electron microscopy(SEM).The results show that a uniform phosphate film with thickness of 6～10 μm and some micro-cracks can be prepared.The film hardly ethibited corrosion phenomenon for 72 h in the neutral salt spray test(NSS).The potentiodynamic polarization curves prove that the Ecorr of the alloy with the film was shifted positively by 150 mV(vs.SCE),the Jcorr was decreased at least by three orders compared with that of the bare substrate.The results confirm that the film possesses good corrosion resistance. |
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| Keywords: | magnesium alloy phosphate film phytic acid chrome-free film |
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