20.500.12556/DiRROS-22076 The effect of metallographic preparation on the surface characteristics and corrosion behaviour of Ti-6Al-4V alloy in simulated physiological solutions 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 oxide obdelala površin metalografika poliranje true false true IOP Publishing Združeno kraljestvo Angleški jezik Slovenski jezik © 2024 The Author(s). Neznano 2025-04-18 15:06:53 2025-04-18 15:06:53 2025-10-24 03:50:29 0000-00-00 00:00:00 2024 0 0 16 str. No. 11 Vol. 171 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-08-14 0000-00-00 2024-11-13 544.7 1945-7111 10.1149/1945-7111/ad8e89 215168259 https://iopscience.iop.org/article/10.1149/1945-7111/ad8e89 1 01a77453-1c56-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=31897 RAZ_Milosev_Ingrid_2024.pdf RAZ_Milosev_Ingrid_2024.pdf 1 1813EC472C8596D8AFAC554CB453EE36 ed6cd50e2f52ba915e767da5eba7497459d93a8edb28b394cfba92a4fe02a36b d660fa30-1c56-11f0-963a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=31898 Institut Jožef Stefan 0 0 0