AZ91D镁合金表面热扩散渗锌膜层研究

朱立群; 刘慧丛; 李卫平; 宋光龄

AZ91D镁合金表面热扩散渗锌膜层研究

1.
北京航空航天大学材料科学与工程学院, 北京 100083
2. 澳大利亚昆士兰大学材料系, 布里斯班 4072

基金项目: 国家863资助项目(2003AA305071)

详细信息

作者简介:
朱立群(1955-),男,山东菏泽人,教授, lq.zhu@sohu.com.

中图分类号: TG 174445
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- 被引次数: 0
出版历程
- 收稿日期: 2003-07-28
- 网络出版日期: 2005-01-31

Zinc alloyed coating on AZ91D magnesium alloys

1.
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. Division of Materials Engineering, The University of Queensland,Brisbane, QLD 4072, Australia

摘要

摘要: 为了提高AZ91D镁合金的耐腐蚀性能和表面硬度,对其进行了表面热处理扩散渗锌处理,并对其得到的膜层表面和断面形貌、结构组成、耐腐蚀性能、显微硬度等性能进行了探讨,测量了该合金热扩散渗锌前后试样的阳极极化曲线和交流阻抗图,这些试验结果都表明在AZ91D镁合金材料表面进行热扩散渗锌获得的表面膜层均匀细致,膜层由Mg₇Zn₃、Mg和Zn构成,而且该膜层与基体相比耐腐蚀性和对镁合金基体的防护性能有了显著提高,并具有较高的表面显微硬度.
- 镁合金 /
- 耐蚀性 /
- 热扩散渗锌膜层
Abstract: In order to improve the corrosion resistance and micro-hardness of AZ91D magnesium alloys, its surface was treated by zinc alloys. The characterization of the above-prepared coating on AZ91D magnesium alloys was studied, andits surface image, cross-section image, XRD image, corrosion resistance abilityand micro-hardness were also researched. The anodic polarization curve and electrochemical impedance spectrum of the coating on AZ91D magnesium alloys were examined before and after the samples being zinc alloyed. All results show that the zinc alloyed coating on AZ91D magnesium alloys is uniform and fine, and it is made up of Mg₇Zn₃, Mg and Zn. This coating has better corrosion resistance and good protective characterization than the magnesium alloys, and it has relatively higher micro-hardness than the magnesium alloys.
- magnesium alloys /
- corrosion resistance /
- zinc alloyed coating

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参考文献(1)

[1] Nakatsugawa I, Takayasu H, Araki K. Electrochemical corrosion studies of thixomolded AZ91D alloy in sodium chloride solution[J]. Materials Science Forum, 2003, 419~422:845~850 [2] Tsubakino H, Yamamoto A, Sugahara K, et al. Corrosion resistance in magnesium alloys and deposition coated magnesium alloy[J]. Materials Science Forum, 2003, 419~422:915~920 [3] 朱立群,李雪源,吴俊,等. 发动机镁合金件改性硅溶胶防护涂层的研究[J]. 材料保护,2002,35(2):17~18 Zhu Liqun, Li Xueyuan, Wu Jun, et al. Protective coating of modified silica sol on the surface of magnesium alloy in aircraft engine[J]. Materials Protection, 2002, 35(2):17~18(in Chinese) [4] 焦树强, 旷亚非, 陈金华,等. 镁及其合金的腐蚀与阳极化处理[J]. 电镀与环保, 2002,22(3):1~4 Jiao Shuqiang, Kuang Yafei, Chen Jinhua, et al. Corrosion behavior and anodization of magnesium and its alloys[J]. Electroplating & Pollution Control, 2002, 22(3):1~4(in Chinese) [5] 李宝东, 申泽骥. 镁合金铸件表面处理技术现状[J]. 材料保护, 2002, 35(4):1~3 Li Baodong, Shen Zeji. Surface treatment technique of magnesium alloy castings[J]. Materials Protection, 2002, 35(4):1~3(in Chinese) [6] Ambat R, Aung R, Zhou W. Evaluation of microstructure effects on corrosion behaviour of AZ91D magnesium alloy[J]. Journal of Corros Sci, 2000,42:1433~1455 [7] Ross P, Macculloch J. New development in anodizing and coloring magnesium . In:AESF Proceedings . Cincinnati Ohio,1999.231~237 [8] Song Guangling, Andrej A, David S J, et al. Corrosion behaviour of the microstructural constituents of AZ alloys[J]. Magnesium Alloys and Their Applications, 2000, 27~28:425~431 [9] Song Guangling, David S J. Corrosion performance of magnesium alloys MEZ and AZ91[J]. International Journal of Cast Metals Research, 2000 , 12(6):327~334 [10] 郭兴伍,丁文江. 镁合金阳极氧化的研究与发展现状[J]. 材料保护, 2002, 35(2):1~3 Guo Xingwu, Ding Wenjiang. Development of anodizing process for magnesium alloys[J]. Materials Protection, 2002, 35(2):1~3(in Chinese) [11] Shigematsu I, Nakamura M, Saitou N, et al. Surface treatmentof AZ91D magnesium alloy by aluminum diffusion coating[J]. Journal of Materials Science Letters,2000, 19:473~475 [12] Zhang M X, Kelly P M. Surface alloying of AZ91D alloy by diffusion coating[J]. J Mater Res, 2002,17:2447~2479

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