Characterizing archaeological bronze corrosion products intersecting electrochemical impedance measurements with voltammetry of immobilized particles

Application of electrochemical impedance measurements to microparticulate deposits of copper corrosion products attached to graphite electrodes in contact with 0.10 M aqueous HClO4 electrolyte is described. The impedance measurements were sensitive to the applied potential and the amount of solid sa...

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Bibliographic Details
Main Author: Redondo-Marugán, Jorge (author)
Other Authors: Piquero-Cilla, Joan (author), Doménech-Carbó, María Teresa (author), Ramírez-Barat, Blanca (author), Al Sekhanehd, Wassef (author), Capelo, Sofia (author), Doménech-Carbó, Antonio (author)
Format: article
Language:eng
Published: 2017
Subjects:
Archaeological bronze
Electrochemical Impedance Measurements
Voltammetry of immobilized particles
Online Access:http://hdl.handle.net/10174/21568
Country:Portugal
Oai:oai:dspace.uevora.pt:10174/21568
Description
Summary:Application of electrochemical impedance measurements to microparticulate deposits of copper corrosion products attached to graphite electrodes in contact with 0.10 M aqueous HClO4 electrolyte is described. The impedance measurements were sensitive to the applied potential and the amount of solid sample and were modeled taking into account the contribution of the uncovered base electrode. Several pairs of circuit elements provide monotonic variations which are able to characterize different corrosion compounds regardless the amount of microparticulate solid on the electrode. Application to a set of archaeological samples from the archaeological Roman site of Gadara (Jordan, 4th century AD) permitted to establish a grouping of such samples suggesting different provenances/manufacturing techniques.

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