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  • Title: [The corrosion and electrochemical properties of new palladium-indium alloys for dentistry].
    Author: Maksimovskiĭ IuM, Grinin VM, Kortukov EV, Gorbov SI, Karagodin IuA, Sinitsyn AA.
    Journal: Stomatologiia (Mosk); 1996; 75(3):10-4. PubMed ID: 9036575.
    Abstract:
    New palladium-based dental materials were examined in a wide spectrum of pH values from 3.8 to 9.6 at 37 degrees C for 315 h. Palladium dissolves in acid (pH 3.8) media with subsequent passivation (formation of complex compounds); areas of passiveness of palladium and its alloys for other pH values were found. The potentials of passiveness currents emerging in such cases were defined for all media, and corrosion curves of the alloys plotted. A film of palladium oxide appearing on the surface of the alloy was found to prevent further corrosion. High corrosion resistance in artificial saliva and high chemical inertness of palladium-indium alloy was revealed. The mechanisms of selective corrosion of the examined alloys and passiveness currents are discussed from the viewpoint of modern physical chemistry, and experimental data are explained. Use of such alloys in dentistry is shown to hold good promise.
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