Multiscale Electrochemical Investigation of the Corrosion Resistance of Various Alloys Used in Dental Prostheses

The electrochemical behavior of Ag-Pd (Paliag), Ni-Cr (Heraenium NA), and Co-Cr (Heraenium CE) alloys used in dental prosthetics construction of crowns and bridges was studied in 0.9 pct NaCl solution at 298 K (25 °C). The localized electrochemical characteristics related to corrosion resistance and...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2015-04, Vol.46 (2), p.1011-1021
Main Authors: Iacoban, Sorin, Mareci, Daniel, Bolat, Georgiana, Munteanu, Corneliu, Souto, Ricardo Manuel
Format: Article
Language:English
Subjects:
Alloys
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion prevention
Corrosion resistance
Density
Dental materials
Dental research
Materials Science
Metallic Materials
Nanotechnology
Oxides
Prostheses
Prosthetics
Silver
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:The electrochemical behavior of Ag-Pd (Paliag), Ni-Cr (Heraenium NA), and Co-Cr (Heraenium CE) alloys used in dental prosthetics construction of crowns and bridges was studied in 0.9 pct NaCl solution at 298 K (25 °C). The localized electrochemical characteristics related to corrosion resistance and eventual breakdown of the protecting oxide layers were investigated by scanning electrochemical microscopy (SECM), whereas potentiodynamic polarization and electrochemical impedance spectroscopy techniques were employed to establish oxide stability. When the corrosion resistance of the alloys was evaluated by means of the corrosion current value determined around their corresponding open circuit potential in 0.9 pct NaCl solution, good protection can be expected resulting from their spontaneous passivation (low current densities in the order of tenths of μ A cm −2 ). The polarization resistance of all the samples increased with immersion time, in the sequence Ag-Pd 
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-014-0280-z