Influence of hydroxyapatite on the corrosion resistance of the Ti-13Nb-13Zr alloy

被引：0
|
作者：
Laís T. Duarte
Sonia R. Biaggio
Romeu C. Rocha-Filho
Nerilso Bocchi
机构：
[1] Universidade Federal de São Carlos,Departamento de Química
来源：
Journal of Materials Science: Materials in Medicine | 2009年 / 20卷
关键词：
Hydroxyapatite; Electrochemical Impedance Spectroscopy; Phosphate Buffer Saline Solution; Anodic Oxide Film; Electrochemical Impedance Spectroscopy Spectrum;
D O I：
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中图分类号：
学科分类号：
摘要：
Electrochemical analyses on the biocompatible alloy Ti-13Nb-13Zr wt% in an electrolyte simulating physiological medium (PBS solution) are reported. Hydroxyapatite (HA) films were obtained on the alloy by electrodeposition at constant cathodic current. Samples of the alloy covered with an anodic-oxide film or an anodic-oxide/HA film were analyzed by open circuit potential and electrochemical impedance spectroscopy measurements during 180 days in the PBS electrolyte. Analyses of the open-circuit potential (Eoc) values indicated that the oxide/HA film presents better protection characteristics than the oxide only. This behavior was corroborated by the higher film resistances obtained from impedance data, indicating that, besides improving the alloy osteointegration, the hydroxyapatite film may also increase the corrosion protection of the biomaterial.
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页码：1009 / 1015
页数：6
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