Ti-6Al-4V ELI合金制成的植入物表面层形成的技术能力。

Technological capabilities of surface layers formation on implant made of Ti-6Al-4V ELI alloy.

作者信息

Kiel-Jamrozik Marta, Szewczenko Janusz, Basiaga Marcin, Nowińska Katarzyna

机构信息

Silesian University of Technology, Faculty of Biomedical Engineering, Department of Biomaterials and Medical Devices Engineering, Zabrze, Poland.

Silesian University of Technology, Faculty of Biomedical Engineering, Department of Biomaterials and Medical Devices Engineering, Zab.

出版信息

Acta Bioeng Biomech. 2015;17(1):31-7.

PMID:25952459

Abstract

PURPOSE

The aim of the presented research was to find a combination of surface modification methods of implants made of the Ti-6Al-4V ELI alloy, that lead to formation of effective barrier for metallic ions that may infiltrate into solution.

METHODS

To this end, the following tests were carried out: roughness measurement, the voltamperometric tests (potentiodynamic and potentiostatic), and the ion infiltration test.

RESULTS

The electropolishing process resulted in the lowering of surface roughness in comparison with mechanical treatment of the surface layer. The anodization process and steam sterilization increased corrosion resistance regardless of the mechanical treatment or electropolishing. The crevice corrosion tests revealed that independent of the modification method applied, the Ti-6Al-4V ELI alloy has excellent crevice corrosion resistance. The smallest quantity of ions infiltrated to the solution was observed for surface modification consisting in the mechanical treatment and anodization with the potential of 97 V.

CONCLUSIONS

Electric parameters deter- mined during studies were the basis for effectiveness estimation of particular surface treatment methods. The research has shown that the anodization process significantly influences the pitting corrosion resistance of the Ti-6Al-4V ELI alloy independent of the previous surface treatment methods (mechanical and electrochemical). The surface layer after such modification is a protective barrier for metallic ions infiltrated to solution and protects titanium alloy against corrosive environment influence.

摘要

目的

本研究的目的是找到一种对Ti-6Al-4V ELI合金制成的植入物进行表面改性的方法组合，该组合能形成有效的屏障，阻止可能渗入溶液的金属离子。

方法

为此进行了以下测试：粗糙度测量、伏安测试（动电位和恒电位）以及离子渗透测试。

结果

与表面层的机械处理相比，电解抛光工艺降低了表面粗糙度。无论进行机械处理还是电解抛光，阳极氧化工艺和蒸汽灭菌都提高了耐腐蚀性。缝隙腐蚀测试表明，无论采用何种改性方法，Ti-6Al-4V ELI合金都具有优异的缝隙腐蚀抗性。对于由机械处理和97 V电位阳极氧化组成的表面改性，观察到渗入溶液中的离子量最少。