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Title: Application of EIS for dating archaeological materials
Authors: Doménech-Carbó, Antonio
Capelo, Sofia
Piquero-Cilla, Joan
Keywords: archaeological metals
voltammetry of microparticles
electrochemical impedance spectroscopy
Issue Date: 2016
Citation: Antonio DOMÉNECH-CARBÓ, Sofia CAPELO, Joan PIQUERO-CILLA, Application of EIS for dating archaeological materials, 10th International Symposium on Electrochemical impedance Spectroscopy (EIS 2016), A Toxa, Spain, 19-24 June 2016.
Abstract: Dating archaeological metals is in general a difficult analytical task. It is described the application of Electrochemical impedance spectroscopy (EIS) for this purpose, based on the measurement of impedance terms associated to the corrosion layers. EIS data were recorded for coins and other archaeological objects upon immersion of the pieces in mineral water and applying a bias potential for the reduction of dissolved oxygen. A generalized treatment, derived from previous analysis of lead and copper-based artifacts, is presented including theoretical expressions for the variation of impedances on corrosion time assuming uniform conditions of corrosion and a potential rate law.
Type: lecture
Appears in Collections:PAO - Comunicações - Em Congressos Científicos Internacionais
CIDEHUS - Comunicações - Em Congressos Científicos Internacionais

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