The effect of metallographic preparation on the surface characteristics and corrosion behaviour of Ti-6Al-4V alloy in simulated physiological solutionsMilošev, Ingrid (Avtor) Sačer, Denis (Avtor) Kapun, Barbara (Avtor) Rodič, Peter (Avtor) This study aimed to determine the effect of surface metallographic preparation (grinding, diamond polishing, and chemo-mechanical polishing using silica and hydrogen peroxide) on the surface roughness, morphology, chemical composition, and electrochemical behaviour of Ti-6Al-4V alloy. Roughness decreases from ca. 0.2 μm to 0.02 μm from grinding to polishing. A typical α+β microstructure can be observed only after chemo-mechanical polishing. The average composition of ca. 6 wt% Al, 4 wt% V, and rest Ti was determined regardless of the surface preparation. X-ray photoelectron spectroscopy revealed that the thickness of the oxide layer formed on chemo-mechanical polished samples is half that of ground samples. The metallographic preparation largely affects the corrosion behaviour of Ti-6Al-4V, which was investigated using electrochemical impedance spectroscopy and potentiodynamic polarisation in 0.9 wt% NaCl and artificial saliva at 37°C. At the open circuit potential, the chemo-mechanically polished Ti-6Al-4 samples showed superior corrosion resistance over ground samples. At potentials over 2.5 V vs Ag/AgCl, increased current densities were noted for chemo-mechanically polished samples, presumably related to the oxidation to a thicker oxideIOP Publishing20242025-04-18 15:06:53Neznano22076UDK: 544.7ISSN pri članku: 1945-7111DOI: 10.1149/1945-7111/ad8e89COBISS_ID: 215168259Združeno kraljestvosl © 2024 The Author(s).