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