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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2016, Volume 67, Issue 11,





Florentina Golgovici, George Razvan Pandelea Dobrovicescu, Mariana Prodana
Electrochemical Characterization of Co-Cr Alloys Used
as Stents in Cardiovascular Applications

Abstract:

The present paper is a comparison study between some alloys based on Co and Cr metals. For the study of corrosion were used two types of alloys Co-Cr with different chemical compositions: Wirobond C and Wirobond 280 marketed by the company Bego. Methods for testing the stability of the alloys in bioliquid that simulates the electrolytes in the human body are the variation of potential in time (open circuit potential-OCP), potentiodynamic polarization tests, electrochemical impedance spectroscopy measurements (EIS) and inductively coupled plasma mass spectrometry (ICP-MS). All studied two types of alloys based on Co-Cr show a low corrosion rate in the studied environments. The presence of oxide coating decreases the release of ions in solution. The small amount of metal ions released in solution is in the domain of part per million. Keywords: corrosion, ion release, Co-Cr alloys, ICP-MS, stability


Issue: 2016, Volume 67, Issue 11
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