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  • Title: Effect of the heating temperature on the corrosion resistance of alkali-treated titanium.
    Author: Krupa D, Baszkiewicz J, Mizera J, Borowski T, Barcz A, Sobczak JW, Biliński A, Lewandowska-Szumieł M, Wojewódzka M.
    Journal: J Biomed Mater Res A; 2009 Mar 01; 88(3):589-98. PubMed ID: 18314897.
    Abstract:
    The paper presents the results of examinations of the corrosion resistance of titanium after its being subjected to the surface modification by the alkali- and heat-treatments. The material examined was commercially pure titanium (grade 2). The samples were soaked in an aqueous 10M NaOH solution at 60 degrees C for 24 h and subsequently heated at 500, 600, or 700 degrees C for 1 h. The chemical composition of the surface layers was determined by X-ray photoelectron spectroscopy and secondary ion mass spectroscopy. The phases present in the layers were identified by XRD. The corrosion resistance was evaluated by electrochemical methods (Stern's method, potentiodynamic method, and impedance spectroscopy) at a temperature of 37 degrees C after short- and long-time exposures. The 13 h exposure was aimed to allow the corrosion potential to stabilize. The aim of the long-term exposures was to examine how the corrosion resistance of the modified samples changes during the exposure. Under the conditions prevailing during the experiments, the highest corrosion resistance was achieved with the samples heated at a temperature of 700 degrees C.
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