Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Corrosion properties of Zn-TiO2 produced by plasma electrolytic oxidation
Submission Author:
Dhanna Elis Francisco , PR
Co-Authors:
Luciane Sopchenski Santos, Carlos augusto Henning Laurindo, Paulo Soares, Dhanna Elis Francisco
Presenter: Dhanna Elis Francisco
doi://10.26678/ABCM.COBEM2017.COB17-2422
Abstract
Surface modifications of metallic implants can be tailored to improve osseointegration and to have bactericidal ability. Zinc is one of the most bactericidal element investigated on the biomaterial field, due to its lower toxicity and to be present in biological processes in the human body, such as acting on protein synthesis. In addition, it acts on the osmotic regulation and maintenance of ionic balance. However, one of the main concerns in the success of an implant is that it resists the process of corrosion which occur in the oral environment. Corrosion process can lead to the failure of the implant and release toxic ions on the human body. In this research, it was obtained titanium oxide coating doped with zinc, and its corrosion resistance was evaluated against Zn free coating. TiO2 layers were produced on titanium grade 4 samples by plasma electrolytic oxidation (PEO). Commercially pure titanium samples were mechanically grounded and ultrasonically cleaned. PEO was carried at 350 V for 60 s using 0.02 mol/L calcium glycerophosphate + 0.15 mol/L of calcium acetate + 0.02 mol/L of zinc acetate. The modified surfaces were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), corrosion assays. SEM images showed micropores and a homogeneous layer. Results showed a higher corrosion resistance on coatings containing zinc.
Keywords
biomaterials, titanium, Zinc, Surface modification, corrosion
