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. 2015 Dec;33(6):646-50.
doi: 10.7518/hxkq.2015.06.020.

[Corrosion resistant properties of different anodized microtopographies on titanium surfaces]

[Article in Chinese]
Huo Fangjun, Xie Li, Tong Xingye, Wang Yueting, Guo Weihua, Tian Weidong

[Corrosion resistant properties of different anodized microtopographies on titanium surfaces]

[Article in Chinese]
Huo Fangjun et al. Hua Xi Kou Qiang Yi Xue Za Zhi. 2015 Dec.

Abstract
in English, Chinese

Objective: To investigate the corrosion resistant properties of titanium samples prepared by anodic oxidation with different surface morphologies.

Methods: Pure titanium substrates were treated by anodic oxidation to obtain porous titanium films in micron, submicron, and micron-submicron scales. The surface morphologies, coating cross-sectional morphologies, crystalline structures, and surface roughness of these samples were characterized. Electrochemical technique was used to measure the corrosion potential (Ecorr), current density of corrosion (Icorr), and polarization resistance (Rp) of these samples in a simulated body fluid.

Results: Pure titanium could be modified to exhibit different surface morphologies by the anodic oxidation technique. The Tafel curve results showed that the technique can improve the corrosion resistance of pure titanium. Furthermore, the corrosion resistance varied with different surface morphologies. The submicron porous surface sample demonstrated the best corrosion resistance, with maximal Ecorr and Rp and minimal Icorr.

Conclusion: Anodic oxidation technology can improve the corrosion resistance of pure titanium in a simulated body fluid. The submicron porous surface sample exhibited the best corrosion resistance because of its small surface area and thick barrier layer.

目的: 探讨阳极氧化制备的钛表面不同微观表面形貌在人工模拟体液中的耐腐蚀性。

方法: 通过阳极氧化法处理纯钛样品（PT），制备亚微米多孔（S）、微米多孔（M）、微米-亚微米复合多孔（MS）3种不同微观表面形貌氧化钛膜层的样品。采用扫描电子显微镜（SEM）观察样品表面形貌特征，X射线衍射仪分析表面晶型组成，表面粗糙度仪测试表面粗糙度，并对膜层横断面样品行SEM扫描观察膜层横断面结构和测量膜层厚度。采用电化学综合测试系统测试样品在人工模拟体液中的自腐蚀电位（Ecorr）、自腐蚀电流密度（Icorr）和极化电阻（Rp），获得Tafel曲线。

结果: 阳极氧化对钛样品表面改性获得了微米多孔、亚微米多孔、微米-亚微米多孔3种不同的微观表面形貌。S样品氧化膜中的阻挡层厚度最大。阳极氧化处理后的样品比未处理的纯钛样品的耐腐蚀性增加；阳极氧化处理样品中，耐腐蚀性能由强到弱依次为S样品、M样品、MS样品，S样品的Ecorr最大，Icorr最小，Rp最大，耐腐蚀性能最优。

结论: 阳极氧化处理可以提高纯钛在人工模拟体液中的耐腐蚀性，亚微米多孔表面钛样品的耐腐蚀性能最优。

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Figures

图 1
图 1. 4种样品的表面形貌 SEM
Fig 1 Surface topography of four samples SEM A：PT样品，× 10 000；B：S样品，× 10 000；C：M样品，× 5 000；D：MS样品，× 10 000。
图 2
图 2. 4种试样表面晶型结构的XRD图谱
Fig 2 XRD patterns of four samples
图 3
图 3. 3种样品的阳极氧化膜层横断面 SEM × 20 000
Fig 3 Cross-sectional micrographs of anodic oxidation film layer of three samples SEM × 20 000 A：S样品；B：M样品；C：MS样品。
图 4
图 4. 4种样品在人工模拟体液中的Tafel拟合曲线图
Fig 4 Tafel fitted curves of four samples in simulated body fluid
See this image and copyright information in PMC

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