Synthesis and corrosion resistance of SiO2-TiO2-ZrO2-Bi2O3 coatings spin-coated on Ti6Al4V alloy
| Autor: | Jhon J Olaya, Jorge Bautista Ruiz, Fabio Leonardo Alférez Vega |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Zirconium
Materials science Scanning electron microscope Process Chemistry and Technology Metallurgy chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Corrosion Dielectric spectroscopy Differential scanning calorimetry chemistry Materials Chemistry Ceramics and Composites Fourier transform infrared spectroscopy 0210 nano-technology Spectroscopy Nuclear chemistry |
| Zdroj: | Ceramics International. 44:2123-2131 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.10.161 |
| Popis: | This report shows the synthesis and corrosion resistance of SiO2-TiO2-ZrO2-Bi2O3 coatings deposited by means of spin-coating on Ti6Al4V alloy. The sols were prepared from a mixture of organic precursors, tetraethoxysilane (TEOS) 98%, titanium tetrabutoxide (TBT) 97%, Zirconium (IV) butoxide (TBZ) 80% in 1-butanol solution, and bismuth nitrate pentahydrate Bi (NO3)3 * 5H2O. The coatings were evaluated via potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests in an electrolytic solution of 3.5% wt NaCl + 0.5 M H2SO4. The rheology and pH of the prepared sols were studied through rheology, pH as a function of time, Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC) analysis. The coatings were characterized via X-ray diffraction (XRD), scanning electron microscopy equipped with dispersive energy spectroscopy (SEMEDX), X-ray fluorescence (XRF), and adhesion measurements. The results showed that the films add good corrosion resistance to the metal substrate, decreasing current densities up to one order of magnitude. |
| Databáze: | OpenAIRE |
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