Structural and corrosion Evaluation for multilayer system conformed by TiCN/TiVCN

Development of more complex hard coatings that can be implemented in increasingly severe and complex conditions is necessary for the evolution of the metalworking industry. Therefore, this research focuses on the synthesis and corrosion study of the [TiCN/TiVCN]n system as a function of the bilayers number. Thus, the structural resulted determined that the quaternary TiVCN coating, which presents very little information so far, presents an FCC structure as the conventional TiCN system, and the inclusion of vanadium atoms that compete with titanium atoms in Wyckoff 4a positions causes a distortion of the crystal lattice that increase with the bilayers number. An increase of 64.3% in the polarization resistance of the multilayers coating with n = 70 bilayers when compared to the n = 1 bilayer. Corrosion rate decreased by 57% when comparing the 70 bilayers coatings with the 1 bilayer coating. The results obtained show that this new multilayer system presents optimum properties to be used as protective coating on engineering devices exposed to high corrosion conditions.