Surface and corrosion electrochemical characterization of titanium foams for implant applications

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1149/1.2128098
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Name affiliation
  1. National Research Council Canada. Automotive and Surface Transportation
  2. National Research Council Canada. NRC Industrial Materials Institute
FormatText
TypeArticle
Journal titleJournal of the Electrochemical Society
ISSN0013-4651
1945-7111
Volume153
Issue1
PagesB13–B21
Subjecttitanium; metal foams; corrosion; electrochemical impedance spectroscopy; porous materials; current density; voltammetry (chemical analysis); biomedical materials
Abstract
Electrochemical impedance spectroscopy has been revealed to be a useful tool to evaluate the exposed surface area and consequently to evaluate the corrosion behavior of titanium foams intended for biomedical applications. In order to find the most accurate corrosion assessment, a new equivalent circuit involving a porous model in series with a double layer model was proposed to fit the experimental data. Although seldom used in the literature, such technique could be useful for the characterization of porous media. Determining corrosion potentials and current densities, the titanium foams have revealed to be slightly more resistant to corrosion in simulated body fluid solutions at 37°C under static mode (no stress applied to the samples) compared to dense and polished titanium. The best titanium foams exibited penetration rates around . Cyclic voltammetry experiments have shown that the titanium oxide layer stability was not affected by the fabrication process of the foams.
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LanguageEnglish
Peer reviewedYes
NPARC number21277288
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Record modified2016-05-09
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