Microstructural aspects of Ti6Al4V degradation in H2O2-containing phosphate buffered saline

被引：31
作者：
Prestat, M. [1 ]
Vucko, F. [1 ]
Holzer, L. [2 ]
Thierry, D. [1 ]
机构：
[1] French Corros Inst, 220 Rue Pierre Rivoalon, F-29200 Brest, France
[2] Zurich Univ Appl Sci, Inst Computat Phys, Wildbachstr 21, CH-8400 Winterthur, Switzerland
来源：
CORROSION SCIENCE | 2021年 / 190卷
关键词：
Titanium; Inflammation; Corrosion; Implants; Fenton chemistry; SIMULATED INFLAMMATORY CONDITIONS; HYDROGEN-PEROXIDE; IMPEDANCE SPECTROSCOPY; BIOCOMPATIBLE METALS; CORROSION BEHAVIOR; FRETTING CORROSION; TITANIUM-ALLOY; H2O2; IMPLANTS; TI;
D O I：
10.1016/j.corsci.2021.109640
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ti6Al4V surfaces were exposed to simulated inflammation conditions in H2O2-containing phosphate buffered saline with and without FeCl3. Scanning electron microscopy analysis revealed significantly different degradation modes for the alpha and beta phases. While the a grains are covered by a ca. 400 nm thick protective nanostructured oxide layer, the attack of the beta phase generates a porous microstructure with microscaled cracks and a low polarization resistance. The beta phase is postulated to be sensitive to H2O2 reduction products and less able to generate a passive oxide film. The presence of FeCl3 enhances the cathodic activity and the beta phase degradation.
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页数：16
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