High-Temperature Corrosion Behavior of Bi3.75La0.25Ti3O12 and Bi3La1Ti3O12 Coating Prepared by rf Magnetron Sputtering

Using the rf magnetron sputtering technique, Bi3.75La0.25Ti3O12 and Bi3La1Ti3O12 coatings were formed obtained as a thin film on Hastelloy substrates. When subjected to high-temperature conditions, effect of lanthanum anti-corrosive properties was investigated. The response evaluated by electrochemical impedance spectroscopy potentiodynamic curves, which are rarely reported. Hot corrosion occurs through mechanism, more information can be tests, very effective fast. behavior at high temperatures studied via molten salt polarization spectroscopy. Additionally, scanning electron microscopy transmission determine their morphology. With X-ray diffraction, crystallinity films determined. It determined that rate directly correlates with temperature, attributed mechanisms induced Na2SO4 V2O5 salts generated condensation. As temperature increases, density current increases in Bi3La1Ti3O12. comparing two compounds, it is increase alters positive acid character, thus reducing dissolution oxides increasing protection.