Electrochemical Characterization of Ca65Mg15Zn20 Amorphous Alloy in Selected Physiological Fluids |
R. Babilas, D. Szyba, A. Kania, W. Pilarczyk and R. Nowosielski
Institute of Engineering Materials and Biomaterials, Silesian University of Technology, S. Konarskiego 18a, 44-100 Gliwice, Poland |
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The corrosion behavior of the bulk glassy samples of Ca65Mg15Zn20 alloy was studied by electrochemical measurements and immersion tests in a simulated body fluid, physiological fluid, and the Ringer solution. The results of immersion show that the volume of H2 evolved after 2 h in simulated body fluid (29.8 ml/cm2) is the highest in comparison with the results of measurements conducted in physiological fluid (11.3 ml/cm2) and the Ringer solution (7.4 ml/cm2). The electrochemical measurements indicated a shift of the corrosion potential (Ecorr) from -1.58 V for plate tested in a physiological fluid to -1.56 V and -1.54 V for samples immersed in the Ringer solution and simulated body fluid, adequately. The X-ray diffraction measurements were used to determine composition of corrosion products. The corrosion products were mainly identified to be calcium carbonates and calcium/magnesium hydroxides. |
DOI: 10.12693/APhysPolA.133.289 PACS numbers: 61.05.cp, 64.70.pe, 68.35.bd, 82.45.Bb, 82.80.Fk |