Avtor/Urednik | Kocijan, Aleksandra; Milošev, Ingrid; Pihlar, Boris | |
Naslov | Cobalt-based alloys for orthopaedic applications studied by electrochemical and XPS analysis | |
Tip | članek | |
Vir | J Mater Sci-Mater M | |
Vol. in št. | Letnik 15 | |
Leto izdaje | 2004 | |
Obseg | str. 643-50 | |
Jezik | eng | |
Abstrakt | The composition of the passive layers formed by electrochemical oxidation at different passivation potentials on Co-Cr-Mo and Co-Ni-Cr-Mo alloys in simulated physiological solution (SPS1, with and without the complexing agent EDTA, was studied by X-ray photoelectron spectroscopy. Composition as a function of depth, cationic fraction and thickness of the passive film was determined. Chromium oxide is shown to be the major constituent of the passive layer on both Co-Cr-Mo and Co-Ni-Cr-Mo alloys. The minor constituents of the passive layers, Co- and Mo-oxide in the case of Co-Cr-Mo alloy and Ni-, Co- and Mo-oxides in the case of Co-Ni-Cr-Mo alloy, are also located in the outer part of the layer. EDTA affects the formation of the passive layer on each alloy. The content of Co-, Niand Mo-oxide in the passive layer is lower in the presence of EDTA, thus indicating increased solubility associated with higher stability constants for complexes of metal cations with E DTA. | |
Deskriptorji | COBALT CHROMIUM ALLOYS MOLYBDENUM NICKEL EDETIC ACID CORROSION SPECTROMETRY, X-RAY EMISSION IMPLANTS, ARTIFICIAL |