| 摘要: |
| 采用恒压直流电源,在不同阳极电压下,以硫酸型溶液作为电解液对医用 TC4 钛合金试样进行阳极氧化处理,在试样表面制得颜色各异的氧化膜。 分别利用涡流测厚仪测量膜厚,利用扫描电镜观测氧化膜形貌,利用 X 射线衍射仪分析氧化膜的物相。 将氧化后的试样放入 Hank’s 模拟体液中进行浸泡腐蚀测试,利用电化学工作站测试其腐蚀规律;研究阳极电压对氧化膜的颜色、膜厚、表面形貌、物相以及耐腐蚀性的影响。 结果表明:阳极电压会影响氧化膜的颜色、膜厚、表面形貌和物相,氧化膜的耐腐蚀性也随之发生变化。 阳极电压从 15 V 增大到 100 V,氧化膜厚度从 6 μm 增大到 28 μm,氧化膜的耐腐蚀性也有明显提高。 医用钛合金经阳极氧化形成以金红石型和锐钛矿型氧化钛为主要结构的氧化膜。 |
| 关键词: 医用钛合金 阳极电压 阳极氧化 物相分析 耐腐蚀性 |
| DOI：10.11933/j.issn.1007-9289.20201125002 |
| 分类号:TG174.451 |
| 文章编号:1007-9289(2020)06-0023-06 |
| 文献标识码:A |
| 基金项目:2019 年常州市模具先进制造高技术研究重点实验室开放基金(2019-03)； 泗洪县重点科技研发计划-产业前瞻与共性关键技术(H201805) |
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| Effects of Voltage on Structure and Corrosion Resistance of Anodic Oxidation Film on Biomedical Titanium Alloy |
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Zhu Xiaoqing1,2, Wang Ye1, Song Ruihong1,2, Wu Haifeng3
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1.School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164 , China;2.Changzhou high technology research key laboratory of mould advanced manufacturing, Changzhou 213164 , China;3.Jiangsu Qianjiahui Smart E- quipment Technology Co.,Ltd, Suqian 223900 , China
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| Abstract: |
| Potentiostatically anodic oxidation of TC4 titanium alloy was employed with different voltages in sulphuric acid solu- tion, result in formation of oxide films with different colors on the sample surface. The thickness was determined by eddy current thickness measurement. The surface morphologies and phase composition were characterized by means of SEM and XRD. The oxidized samples were soaked in Hank’s simulated body fluid for immersion corrosion test. The corrosion process was investiga- ted by electro-chemistry workstation. The effects of voltage on the color, thickness, phase, surface morphology and corrosion re- sistance of the oxide film were discussed. Results show that the color change, thickness, phase, surface morphology and corro- sion resistance of the oxide film have a periodic variation with the anode voltage. With the voltage increasing from 15 V to 100 V, the thickness raise from 6 μm to 28 μm, and the corrosion resistance is correspondingly improved. Oxide films of titanium alloy after anodic oxidation are all consisted of rutile and anatase phases. |
| Key words: biomedical titanium alloy anode voltage anodic oxidation phase analysis corrosion resistance |
