Study on Surface Modification of Porous NiTi Alloys by Direct Current-Pulse Anodic Oxidation

被引：0
作者：
Li Qiang [1 ,2 ]
Yu Jingyuan
Sun Xudong [2 ]
机构：
[1] Liaoning Univ Technol, Coll Mat & Chem Engn, Jinzhou 121001, Peoples R China
[2] Northeastern Univ, Shenyang 110004, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2010年 / 39卷 / 07期
关键词：
porous NiTi alloy; anodic oxidation; direct current-pulse; surface modification; oxidation film; SHAPE-MEMORY ALLOY;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Surface of porous NiTi alloys was modified by direct current-pulse anodic oxidation technology at low temperature. The process of direct current-pulse anodic oxidation was analyzed. The phase composition, morphology and anti-corrosion behavior of the anodic oxidation film were studied by XPS, SEM and potentiodynamic polarization, respectively. The Ni release of porous NiTi alloys before and after anodic oxidation was investigated in simulated body fluid. The results show a uniform porous oxidation film with a thickness of about 190 nm on the surface of the porous NiTi alloy was obtained after anodic oxidation at direct current of 3 A and pulse current of 6 A. The oxidation film was mainly composed of the oxides of Ti. The corrosion resistance of porous NiTi alloys was obviously improved and the rate of Ni release was significantly reduced after anodic oxidation.
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页码：1270 / 1274
页数：5
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