Mingmin Zhu , Jing Wang , Yanxiao Zhang , Jie Wang , Qing Xu , Ming Liu
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引用次数: 0
Abstract
In order to reveal the effect of fluoride ions (F−) on the passive film corrosion resistance and composition of CoCrMo dental prosthesis. The passivity of casting Vitallium 2000 CoCrMo series alloy was systematically studied by adopting electrochemical and surface techniques. The results show that F− have a certain effect on the passive film corrosion resistance of casting CoCrMo in oral environment, and the increase of F− concentration weakens the passive film corrosion resistance. With the increase of F− concentration, the open circuit potential moves negatively, the corrosion current density increases, the polarization resistance decreases, and the defect density in the passive film increases. With the extension of immersion time, the corrosion resistance of alloy will be enhanced and shows: AS > AS + 0.5 wt% NaF > AS + 1 wt% NaF. The addition of F− can decrease Co, Cr and Mo peaks sharply and promote the dissolution of the passive film. The result of present study could regulate and guide the application dose of oral fluorine-containing products.
期刊介绍:
International Journal of Electrochemical Science is a peer-reviewed, open access journal that publishes original research articles, short communications as well as review articles in all areas of electrochemistry: Scope - Theoretical and Computational Electrochemistry - Processes on Electrodes - Electroanalytical Chemistry and Sensor Science - Corrosion - Electrochemical Energy Conversion and Storage - Electrochemical Engineering - Coatings - Electrochemical Synthesis - Bioelectrochemistry - Molecular Electrochemistry