Mechanical, Microstructural and Tribo-Electrochemistry Characterization in Aqueous Media of Coatings Vanadium / Vanadium Nitride Used as Functional Coating for Implants

摘要

The study presents tribo-electrochemistry properties of multilayers of Vanadium / vanadium nitride [V/ VN] n (n = 1, 20, 50 and 100) deposited on surgical grade steel 316LVM through the Physical VaporDeposition processes (PVD) using Magnetron Sputtering Technology. Nanoindentation tests wereperformed to determine the hardness of the coatings corrosion tests and assays tribocorrosion (synergybetween corrosion and wear), which were carried out with equipment potentiostatic type adapted to apin on disk tribometer also performed which was adapted to an electrochemical cell with threeelectrodes: A silver/silver chloride reference electrode (Ag/AgCl), a counter electrode of platinum anda working electrode immersed in a solution of ringers lactate at a temperature of 37 C. The evaluationof the tribo-corrosion testing was performed using the electrochemical technique potentiodynamiccurve to calculate the value of polarization resistance Tafel polarization curves to determine thecorrosion rate in the coatings. The characterization of microstructural and morphological subjected tofretting corrosion coatings it was performed using the technique of atomic force microscopy (AFM).