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Electrochemical response of (β-TCP and HA) individual coatings and [β-TCP/HA] multilayers coatings exposed to biocompatible environments

Abstract:

The following study shows the comparative analysis of the electrochemical properties [β-TCP/HA]n as a function of the bilayers number (n = 1, 10, 30 and 50), which have been currently implemented on biomedical devices and which do not have detailed studies when these coatings are exposed to a solution that simulates body fluids (Hanks solution). These results determined that by increasing the number of bilayers or interfaces (n = 50 bilayers), the roughness decreased by 46.1% compared to the coating with less bilayers number (n = 1 bilayer). Subsequently, the electrochemical analysis showed an increase of 88.45% in the polarization resistance of the coating with 50 bilayers compared to the coating with 1 bilayer, followed by the comparison of the corrosion rate, which determined a decrease of 95.16% compared to the coating with 50 bilayers with 1 bilayer. Finally, the results obtained evidenced that the [β-TCP/HA]n coating with n = 50 bilayers presented the best set of properties, demonstrating that this coating is a suitable candidate for use as a protective coating for biocompatible devices.