Author:

Keywords:

Biomedical Engineering, 0601 Biochemistry and Cell Biology, 0903 Biomedical Engineering

Abstract:

For the characterization of Mg alloy degradation different approaches are used, applying electrochemistry, in vitro immersion testing and in vivo implantation. However, results found in literature show discordance [1-3]. Potentiodynamic polarization (PDP) experiments give a comparison of different Mg alloys behaviour by assessing the rate at which the anodic and the cathodic reactions take place [4]. The rotating disc electrode (RDE), where the working electrode is a disc in rotation, is a better approach for characterization with PDP [5, 6]. This RDE makes a fluid flow which removes the dissolved Mg2⁺ ions from the surrounding of the Mg surface avoiding the formation of a corrosion layer influencing the measurement [7]. The goal of this work is to clarify the effect of the rotation (ω) on the polarization results with RDE.