[Electrochemical evaluation of (Ti, Nb) ON-coated dental alloys for quality assurance].
The chemically stable (Ti, Nb) ON hard coating is suitable for passivating the 18 dental alloys investigated. The exchange current densities are less than jg = 1 microA/cm2. The corrosion current densities are included in this, and are therefore generally lower. The electrochemical investigations provide no hints as to local corrosion for (Ti, Nb) ON-coated dental alloys, which could be a hazard for patients or for dental work, owing to galvanic corrosion or pitting on long-term use. Irrespective of the coated dental alloy, the coatings have pores, through which the electrolyte is in contact with the substrate material. The resulting local elements have high source resistances, so that with a relative pore-area not exceeding 2% only low galvanic current densities occur.
Universitätsklinik und Polikliniken für Zahn-, Mund- und Kieferkrankheiten Universität Würzburg.
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D003343:Corrosion; D003722:Dental Alloys / Q000592:standards*; D004563:Electrochemistry; D006801:Humans; D009556:Niobium; D011785:Quality Assurance, Health Care; D014025:Titanium
D003722:Dental Alloys; D009556:Niobium; D014025:Titanium
Elektrochemische Prüfungen von (Ti, Nb) ON-beschichteten Dentallegierungen zur Qualitätssicherung.