| 王浩伟,朱培,殷强,刘元海,王媛媛,何卫平.微弧氧化溶液pH值对ZM5膜层性能研究[J].装备环境工程,2023,20(12):142-148. WANG Hao-wei,ZHU Pei,YIN Qiang,LIU Yuan-hai,WANG Yuan-yuan,HE Wei-ping.pH Value of Micro-arc Oxidation Solution on the Properties of ZM5 Film[J].Equipment Environmental Engineering,2023,20(12):142-148. |
| 微弧氧化溶液pH值对ZM5膜层性能研究 |
| pH Value of Micro-arc Oxidation Solution on the Properties of ZM5 Film |
| 投稿时间：2023-10-09 修订日期：2023-11-20 |
| DOI：10.7643/issn.1672-9242.2023.12.018 |
| 中文关键词: 镁合金 微弧氧化 pH值 耐蚀性 阻抗 硬度中图分类号:TG174.4 文献标识码:A 文章编号:1672-9242(2023)12-0142-07 |
| 英文关键词:magnesium alloy micro-arc oxidation pH value corrosion resistance impedance hardness |
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| Author | Institution |
| WANG Hao-wei | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
| ZHU Pei | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
| YIN Qiang | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
| LIU Yuan-hai | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
| WANG Yuan-yuan | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
| HE Wei-ping | Key Laboratory of Aviation Science and Technology for Structural Corrosion Protection and Control, China Special Vehicle Research Institute, Hubei Jingmen 448035, China |
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| 中文摘要: |
| 目的 扩大镁合金的应用范围，增强其耐蚀性。方法 取镁合金ZM5为研究对象，利用微弧氧化技术对其表面进行改性处理。首先，对ZM5合金基体进行前处理；然后，在不同pH值的电解质溶液中，通过微弧氧化的方式在ZM5表面原位生长一层微弧氧化陶瓷膜层；最后，利用扫描电镜、X射线衍射、电化学测试等表征技术，系统研究微弧氧化处理对ZM5合金表面形貌、元素组成、微观结构及性能的影响规律。结果 通过调节溶液的pH，能够有效制备出表面连续而且完整的微弧氧化膜层，在pH=11条件下，制备的膜层具有较好的耐蚀性，能显著降低其腐蚀电流密度，膜层的厚度达到35.1 μm，微弧氧化表面处理技术能够显著提高镁合金的表面硬度，硬度最大为582HV。结论 改变溶液pH能够使膜层具有较高的耐蚀性和有效提高表面硬度，为进一步扩大镁合金在军用装备上的应用提供可能性。 |
| 英文摘要: |
| Magnesium alloys possess high specific strength attributed to their low density, but the inferior corrosion resistance has severely impeded their widespread implementation. In an endeavor to expand the application scope of magnesium alloys in national defense and military apparatus, it is necessary to adopt surface treatment to improve their corrosion resistance. ZM5 magnesium alloy was selected as the research subject, and its surface was altered by micro-arc oxidation technology. Firstly, ZM5 alloy substrate was pretreated. Thereafter, micro-arc oxidation ceramic coating was in-situ engendered on the surface of ZM5 by means of micro-arc oxidation in electrolyte solutions under different pH values. Finally, scanning electron microscope, X-ray diffraction, and electrochemical testing were utilized to systemically study the effect of micro-arc oxidation treatment on the morphology, composition, micro-structure and performance of the ZM5 magnesium alloy substrate. The results demonstrated that adjusting the solution pH effectively produced continuous and complete micro-arc oxidation coatings on the surface. The coating prepared at pH=11 showed superior corrosion resistance and substantially reduced the corrosion current density, with a thickness of 35.1 μm. Micro-arc oxidation surface treatment drastically increased the surface hardness of the magnesium alloy to a maximum of 582HV. The alteration of solution pH enables the ceramic coating to acquire superior corrosion resistance and enhances surface hardness, thus providing feasibility for further expanding the application of magnesium alloys in military equipment. |
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