This paper deals with the comparative corrosion behavior of some commercially available biomedical alloys used in fixed prosthetic works. Nowadays the patients prefer the aesthetic materials, such as ceramics, but for high load-bearing areas (non-esthetic zones) in order to increase the lifetime of the restorations it is still preferred a combination between metallic and aesthetic materials (e.g. metallic-ceramic structures). Even though under the aggressive mouth environment all metallic biomaterials have the ability to form a passive layer, in some cases this is destroyed due to high loads encountered during the mastication process and metallic ions are released into the body. Thus, the selected metallic alloys used in fixed prosthetic works were experimentally investigated in different solutions by using electrochemical methods such as: open circuit potential (OCP), polarization resistance (Rp) and dynamic potential polarization (PD) to assess corrosion resistance, corrosion rate (Vcor) and film potential range. The tested materials were examined by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX).

Acknowledgments: This work is supported by the project “ANTREPRENORDOC”, in the framework of Human Resources Development Operational Programme 2014-2020, financed from the European Social Fund under the contract number 36355/23.05.2019 HRD OP /380/6/13 – SMIS Code: 123847.