Preparation and Corrosion Resistance of Bionic Coatings on Pure Titanium by Microarc Oxidation and Alkali-heat Treatment

doi:10.11902/1005.4537.2013.118

Journal of Chinese Society for Corrosion and protection

2014, Vol. 34

Issue (3): 277-282 DOI: 10.11902/1005.4537.2013.118

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Preparation and Corrosion Resistance of Bionic Coatings on Pure Titanium by Microarc Oxidation and Alkali-heat Treatment

CAI Siqi¹, ZHAO Xuan², LUO Qiang², LI Xinwei², CAI Qizhou²(

)

1. School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2. School of Materials Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

采用微弧氧化-碱热处理在纯Ti表面制备了含有羟基磷灰石 (HA) 的仿生陶瓷膜。利用SEM,XRD和电化学工作站等手段研究了膜层的形貌、物相及其耐蚀性。结果表明：在乙酸钙-磷酸二氢钙电解液体系中微弧氧化 (MAO),纯Ti表面形成一层含Ca和P的TiO₂多孔陶瓷膜。经水热处理后,膜层表面的孔洞变小、致密性增加,膜层中还出现了鳞状、层片状以及针棒状的HA。在Hank's模拟体液中,MAO膜和微弧氧化-碱热处理 (MAOAH) 膜均表现出较好的耐蚀性。MAO膜经模拟体液腐蚀后,形成了缺钙型HA (Ca_8.86(PO₄)₆(H₂O₂)₂) 和CaTiO₃；而模拟体液中的阴离子与MAOAH膜层的氧化物作用使膜层孔洞直径和深度增加。

Key words: pure titanium micro-arc oxidation alkali-heat treatment hydroxyapatite corrosion resistance

Received: 17 August 2013

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Cite this article:

CAI Siqi, ZHAO Xuan, LUO Qiang, LI Xinwei, CAI Qizhou. Preparation and Corrosion Resistance of Bionic Coatings on Pure Titanium by Microarc Oxidation and Alkali-heat Treatment. Journal of Chinese Society for Corrosion and protection, 2014, 34(3): 277-282.

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https://www.jcscp.org/EN/10.11902/1005.4537.2013.118 OR https://www.jcscp.org/EN/Y2014/V34/I3/277

Fig.1

两种膜层的表面形貌

Table 1 Elemental compositions of MAO and MAOAH coatings (atomic fraction / %)

Fig.2

MAO 膜和 MAOAH膜的XRD谱

Table 2 Relative content of anatase and rutile in MAO and MAOAH coatings (relative content / %)

Fig.3

3组试样的自腐蚀电位曲线

Fig.4

模拟体液中纯Ti, MAO膜和MAOAH膜的极化曲线 (纵坐标单位)

Fig.5

3组试样腐蚀后的形貌

Fig.6

3组试样腐蚀后表面的XRD谱

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