| AZ91D镁合金钒酸盐转化膜的最佳制备工艺 |
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| 引用本文： | 赵睛,王帅星,朱文辉,简志超,马刚. AZ91D镁合金钒酸盐转化膜的最佳制备工艺[J]. 材料保护, 2011, 44(2): 30-32,7 |
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| 作者姓名： | 赵睛 王帅星 朱文辉 简志超 马刚 |
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| 作者单位： | 南昌航空大学轻合金加工科学与技术国防重点学科实验室,江西,南昌,330063 |
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| 摘 要： | 过去,对镁合金钒酸盐无铬转化工艺的研究较少.通过正交试验和单因素试验优选了以NH4VO3为主盐的镁合金钒酸盐转化工艺.结果发现,在5 g/L NH4VO3,30 g/L H2PO2-,30 g/L NH4NO3,60 ℃条件下成膜15min可以在AZ91D镁合金表面形成均匀、完整的灰色转化膜;该膜层的微观形貌与铬酸盐转...
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| 关 键 词： | 钒酸盐转化膜 镁合金 微观形貌 耐蚀性 正交试验 单因素试验 |
Optimal Preparation Technology of Vanadate Conversion Coating on AZ91D Magnesium Alloy |
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| ZHAO Qing,WANG Shuai-xing,ZHU Wen-hui,JIAN Zhi-chao,MA Gang. Optimal Preparation Technology of Vanadate Conversion Coating on AZ91D Magnesium Alloy[J]. Journal of Materials Protection, 2011, 44(2): 30-32,7 |
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| Authors: | ZHAO Qing WANG Shuai-xing ZHU Wen-hui JIAN Zhi-chao MA Gang |
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| Affiliation: | ZHAO Qing,WANG Shuai-xing,ZHU Wen-hui,JIAN Zhi-chao,MA Gang(National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang University of Aeronautics,Nanchang 330063,China). |
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| Abstract: | Vanadate conversion technology for AZ91D Mg alloy with NH4VO3 as the major salt was optimized based on orthogonal test and single-factor test.It was found that uniform and integral gray conversion coating was obtained on the surface of Mg alloy by immersing in the conversion solution composed of 5 g/L NH4VO3,30 g/L H2PO-2 and 30 g/L NH4NO3 at 60 ℃ for 15 min.Resultant vanadate conversion coating was similar to chromate conversion coating in microstructure.Namely,uniformly distributed net-like micro-cracks existed on the surface of the conversion coating,similar to "the rimose land".The conversion coating was mainly composed of Mg,O,V,P and Al,and was able to significantly increase the corrosion potential and decrease corrosion current density of Mg alloy,improving the corrosion resistance of Mg alloy. |
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| Keywords: | vanadate conversion coating magnesium alloy microstructure corrosion resistance orthogonal test single-factor test |
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