张昕,王婷,白晶,薛烽,储成林.不同工艺参数对微弧氧化医用纯锌表面微观组织和性能的影响[J].表面技术,2021,50(2):39-47.
ZHANG Xin,WANG Ting,BAI Jing,XUE Feng,CHU Cheng-lin.Effects of Different Technological Parameters on Surface Microstructure and Properties of Micro-arc Oxidized Medical Pure Zinc[J].Surface Technology,2021,50(2):39-47 |
| 不同工艺参数对微弧氧化医用纯锌表面微观组织和性能的影响 |
| Effects of Different Technological Parameters on Surface Microstructure and Properties of Micro-arc Oxidized Medical Pure Zinc |
| 投稿时间：2020-10-14 修订日期：2021-01-22 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.02.005 |
| 中文关键词: 锌 微弧氧化 耐蚀性 润湿性 表面处理 |
| 英文关键词:zinc micro-arc oxidation corrosion resistance wettability surface treatment |
| 基金项目:国家自然科学基金(51771054) |
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| Author | Institution |
| ZHANG Xin | Southeast University, Nanjing 211189, China |
| WANG Ting | Southeast University, Nanjing 211189, China |
| BAI Jing | Southeast University, Nanjing 211189, China |
| XUE Feng | Southeast University, Nanjing 211189, China |
| CHU Cheng-lin | Southeast University, Nanjing 211189, China |
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| 中文摘要: |
| 目的 通过控制微弧氧化工艺参数来优化纯锌的耐蚀性，以实现临床降解的可控性。方法 通过设置正向电压、反应时间、占空比、负向电压和分段处理等，在纯锌表面制备微弧氧化膜层。利用扫描电镜(SEM)观察膜层的表面形貌和截面厚度，结合能谱仪(EDS)和X射线衍射仪(XRD)分析膜层元素和相结构，采用表面张力测量仪和电化学极化曲线分析润湿性和耐蚀性。结果 通过提高正向电压，降低占空比，控制处理时间和负向电压，可有效降低膜层孔隙率和腐蚀速度。微弧氧化处理可明显增强试样表面亲水性，分段处理对润湿性和耐蚀性有显著影响。当正向电压为300 V，占空比为10%，反应时间为5 min，负向电压为–100 V时，可获得亲水性好、耐蚀性强的微弧氧化膜层，其孔隙率为10.95%，膜层厚度为5.29 μm，腐蚀电流密度达5.74×10–6 A/cm2。结论 微弧氧化处理可明显增强纯锌表面润湿性，可通过调节不同微弧氧化工艺参数改变膜层结构，优化其亲水性和耐蚀性。 |
| 英文摘要: |
| This paper aims to achieve the medical degradation controllability by optimizing the corrosion resistance of pure zinc through controlling the technological parameters of micro-arc oxidation. By setting different technological parameters such as positive voltage, reaction time, duty cycle, negative voltage and subsection treatment, a micro-arc oxidation (MAO) film was formed on the surface of pure zinc. The surface morphology and section thickness of the MAO film were observed by scanning electron microscopy (SEM). Elements and phase structure of the MAO film were analyzed by energy disperse spectroscopy (EDS) and X-ray diffraction (XRD). The wettability and corrosion resistance were analyzed by surface tension meter and electrochemical polarization curve. The results show that the porosity and corrosion rate of the film could be effectively reduced by increasing the positive voltage, reducing the duty cycle and controlling the treatment time and negative voltage, the micro-arc oxidation treatment can increase the hydrophilicity of the sample surface, and the segmented treatment has a significant effect on wettability and corrosion resistance. When the positive voltage is 300 V, the duty cycle is 10%, the reaction time is 5 min, and the negative voltage is –100 V, the MAO films with strong hydrophilicity and good corrosion resistance can be formed. The film has a porosity of 10.95%, a film thickness of 5.29 μm and a corrosion current density of 5.74×10–6 A/cm2. Therefore, it is concluded that the micro-arc oxidation treatment can obviously enhance the hydrophilicity of pure zinc surface, and the film structure can be changed by adjusting different technological parameters of the micro-arc oxidation, so as to optimize its wettability and corrosion resistance. |
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