Effect of inflammatory conditions and H2O2 on bare and coatedTi–6Al–4V surfaces: Corrosion behavior, metal ion release and Ca-P formation under long-term immersion in DMEM

Journal article


Publication Details

Author(s): Höhn S, Virtanen S
Journal: Applied Surface Science
Publication year: 2015
Journal issue: 357
Pages range: 101-111
ISSN: 0169-4332
Language: English


Abstract


The surface oxide film and calcium-phosphate (Ca-P) formation on Ti–6Al–4V during long-term immer-sion in biological environments play a decisive role for the biocompatibility of the implant. Hence, theaim of the study was to evaluate the corrosion resistance, metal ion release and Ca-P formation in DMEMunder physiological conditions at pH values of 7.4 and in comparison under simulated inflammatory con-ditions with pH 5 and in presence of H2O2. Furthermore, the influence of the immersion conditions wasinvestigated on different surface treatments: on bare Ti–6Al–4V, after anodization, and for TiO2nanopar-ticle (NP) and hydroxyapatite (HA)-incorporated TiO2-NP coatings. In the absence of H2O2, the impedanceresponse indicated a stable thin oxide film and Ca-P formation after 28 days or 56 days depending onthe coating, while under inflammatory conditions the Ca-P formation on the surface is time-delayed anddissolution of the anodized oxide layer as well as selective etching of the β-phase and phase boundariesin case of the bare alloy occur. Electrochemical impedance spectroscopy (EIS), however, indicates a goodgeneral corrosion behavior in all cases. The quantities of Ti, Al and V released from the bare and coatedTi–6Al–4V alloy markedly increased with decreasing pH (pH ≤ 5). Although the rapid increase of metalrelease was observed for all samples at pH 5, the quantities were significantly higher for the bare andanodized alloy than after coating with TiO2-NP or HA.



FAU Authors / FAU Editors

Höhn, Sarah
Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)
Virtanen, Sannakaisa Prof. Dr.
Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)


How to cite

APA:
Höhn, S., & Virtanen, S. (2015). Effect of inflammatory conditions and H2O2 on bare and coatedTi–6Al–4V surfaces: Corrosion behavior, metal ion release and Ca-P formation under long-term immersion in DMEM. Applied Surface Science, 357, 101-111. https://dx.doi.org/10.1016/j.apsusc.2015.08.261

MLA:
Höhn, Sarah, and Sannakaisa Virtanen. "Effect of inflammatory conditions and H2O2 on bare and coatedTi–6Al–4V surfaces: Corrosion behavior, metal ion release and Ca-P formation under long-term immersion in DMEM." Applied Surface Science 357 (2015): 101-111.

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Last updated on 2018-10-08 at 23:00