Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/5108
Title: Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis
Authors: Acciari, Heloísa A. 
Guastaldi, Antonio C. 
Brett, Christopher M.A. 
Keywords: A. Dental amalgams; A. Amalgam phases; B. Electrochemical impedance spectroscopy (EIS); B. Electrochemical noise analysis; C. Chloride corrosion
Issue Date: 2005
Keywords: A. Dental amalgams; A. Amalgam phases; B. Electrochemical impedance spectroscopy (EIS); B. Electrochemical noise analysis; C. Chloride corrosion
Issue Date: 2005
Citation: Corrosion Science. 47:3 (2005) 635-647
Abstract: The corrosion resistance of three of the constituent phases in high copper dental amalgams has been investigated by electrochemical methods in 0.9% NaCl solution. Polarization curves show corrosion potentials most positive for [gamma]1-Ag2Hg3, followed by Ag-Cu, and [gamma]-Ag3Sn in agreement with the order of corrosion resistance deduced from the corrosion currents. Complex plane impedance plots at the open circuit potential showed distorted semicircles with diffusional components at low frequency for Ag-Hg and Ag-Cu, while for [gamma]-Ag3Sn a layer of corrosion products is formed, partially or completely covering the surface of the electrode. Impedance and noise spectra have been compared in the frequency domain, and show good agreement.
URI: http://hdl.handle.net/10316/5108
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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