硅溶胶在镁合金阳极氧化反应中的成膜作用

李一泓; 朱立群; 刘慧丛; 陈贻炽

硅溶胶在镁合金阳极氧化反应中的成膜作用

北京航空航天大学材料科学与工程学院, 北京 100083

基金项目: 航空基金资助项目(04H51002)

详细信息

作者简介:
李一泓(1983-),女,北京人,硕士生, liyihong@mse.buaa.edu.cn.

中图分类号: TG 174.451
计量
- 文章访问数: 3805
- HTML全文浏览量: 97
- PDF下载量: 1616
- 被引次数: 0
出版历程
- 收稿日期: 2007-03-13
- 网络出版日期: 2008-02-29

Behavior of silica sol during the anodizing process of magnesium alloy

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 采用溶胶化学与电化学相结合的新型表面处理方法——将自制的硅溶胶添加到电解质溶液中进行阳极氧化.以AZ91D镁合金及镁锂合金为研究基材,研究体系分别为硅酸钠和氢氧化钠溶液,通过对不同溶胶添加量下的溶液电导率、反应击穿电压、氧化膜层厚度及微观形貌、膜层表面成分及XRD结果分析,来探讨溶胶粒子在成膜过程中的作用.结果表明:溶胶粒子的加入增大了阳极表面的电阻,使得反应的击穿电压升高,从而导致了膜层厚度增加;同时硅溶胶粒子参与了阳极氧化反应,其在高温高压的条件下与MgO生成了Mg₂SiO₄.
- 镁合金 /
- 阳极氧化 /
- 硅溶胶
Abstract: Anodic films were prepared on AZ91D magnesium alloy and Mg-Li alloy separately in 150 g/L NaOH and 1.0 mol/L Na₂SiO₃ with varied silica sol addition. The conductivity of the solution and the surface morphologies of the anodic films were characterized by conductivity instrument (DDS-307) and scanning electron microscopy (SEM). The solution-s conductivity would become small with the silica sol addition. The energy dispersion spectrometry (EDS),the thickness and the X-ray diffraction (XRD) of the films were also investigated. Results show that the thickness of the anodic film increases linearly with the addition of silica sol in both solutions and mainly depends on the anodizing break voltage which is affected by the solution-s conductivity and the resistance of the magnesium/solution interface. The sol particles take part in the anodizing reaction process. The silica sol reacts with MgO and the product is Mg₂SiO₄.
- magnesium /
- anodic oxidation /
- silica sol

HTML全文

参考文献(1)

[1] 李卫平,朱立群.镁及其合金表面防护性涂层国外研究进展[J].材料保护,2005,38(2):41-46 Li Weiping, Zhu Liqun. Recent progress in research of protective coatings on magnesium and its alloys[J]. Materials Protection,2005,38(2):41-46(in Chinese) [2] 朱立群,刘慧丛,李卫平,等. AZ91D镁合金表面热扩散渗锌膜层研究[J].北京航空航天大学学报,2005,31(1):8-12 Zhu Liqun, Liu Huicong, Li Weiping, et al. Zinc alloyed coating on AZ91D magnesium alloys[J]. Journal of Beijing University of Aeronautics and Astronautics,2005,31(1):8-12(in Chinese) [3] Gray J E, Luan B. Protective coatings on magnesium and its alloys: a critical review[J]. Journal of Alloys and Compounds,2002,336:88-113 [4] 梁永政,郝远,张汉茹,等.镁合金表面技术的研究近况[J].铸造设备研究,2003,5:48-51 Liang Yongzheng, Hao Yuan, Zhang Hanru, et al. The development of surface technology of magnesium alloy[J]. Research Studies on Foundry Equipment,2003,5:48-51(in Chinese) [5] 霍宏伟,郑志国,李明升,等. 镁合金的阳极氧化研究[J]. 稀有金属材料与工程,2005,34(9):1345-1348 Huo Hongwei, Zheng Zhiguo, Li mingsheng, et al.Investigation on anodization of magnesium alloys[J]. Rare Metal Materials and Engineering, 2005,34(9):1345-1348(in Chinese) [6] 殷馨,戴媛静.硅溶胶的性质、制法及应用[J].化学推进剂与高分子材料,2005,3(6):27-32 Yin Xin, Dai Yuanjing. Characteristics, manufacture and application of silica sol[J]. Chemical Propellants & Polymeric Material,2005,3(6):27-32(in Chinese) [7] 朱立群,刘慧丛.溶胶成分对镁合金阳极氧化膜层的影响研究[J].功能材料,2006,36(6):923-926 Zhu Liqun, Liu Huicong. The effect of sol ingredient to anodic oxidation film on magnesium alloys[J].Journal of Functional Materials,2006,36(6):923-926(in Chinese) [8] Li Weiping, Zhu Liqun, Li Yihong. Electrochemical oxidation characteristic of AZ91D magnesium alloy under the action of silica sol[J]. Surface & Coatings Technology,2006,201:1085-1092 [9] Li Weiping, Zhu Liqun, Liu Huicong. Effects of silicate concentration on anodic films formed on AZ91D magnesium alloy in solution containing silica sol[J]. Surface & Coatings Technology,2006,201:2505-2511 [10] Li Weiping, Zhu Liqun, Liu Huicong. Preparation of hydrophobic anodic film on AZ91D magnesium alloy in silicate solution containing silica sol[J]. Surface & Coatings Technology,2006,201:2573-2577 [11] 李卫平.溶胶对镁合金表面阳极氧化和阴极电沉积过程的作用机制研究 .北京:北京航空航天大学材料科学与工程学院,2006 Li Weiping. Modification of anodizing and electroplating process for AZ91D magnesium alloy by sols .Beijing: School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics,2006(in Chinese) [12] 旷亚非,侯朝辉,刘建平.阳极氧化过程中电击穿理论的研究进展[J].电镀与涂饰,2000,19(3):38-41 Kuang Yafei, Hou Zhaohui, Liu Jianping. Development of electric breakdown theory of anodic oxidation[J]. Electroplating & Finishing,2000,19(3):38-41(in Chinese)

施引文献

资源附件(0)

访问统计