0000000000303180

AUTHOR

Jorge Redondo-marugán

showing 3 related works from this author

Electrochemical Characterization and Dating of Archaeological Leaded Bronze Objects Using the Voltammetry of Immobilized Particles

2017

Financial support from the MINECO Projects CTQ2014-53736-C3-1-P and CTQ2014-53736-C3-2-P, which are supported by ERDF funds, is gratefully acknowledged. We wish to thank the Fondo de Arte y Patrimonio of the Universitat Politecnica de Valencia; the Museu de Prehistoria of Valencia, and its director Helena Bonet and curator Jaime Vives-Ferrandiz; and the Museu Municipal of Xativa and its director Angel Velasco. We also wish to thank Dr Jose Luis Moya Lopez and Mr Manuel Planes Insausti (Microscopy Service of the Universitat Politecnica de Valencia) for technical support.

ArcheologyHistorybiologymedia_common.quotation_subject010401 analytical chemistry02 engineering and technologyArtengineering.material021001 nanoscience & nanotechnologybiology.organism_classification01 natural sciencesArchaeology0104 chemical sciencesengineeringBronze0210 nano-technologyValenciamedia_commonArchaeometry
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Electrochemical Characterization of Corrosion Products in Leaded Bronze Sculptures Considering Ohmic Drop Effects on Tafel Analysis

2015

[EN] The characterization of corrosion products in leaded bronze based on the voltammetry of immobilized particles methodology is described. Voltammetric data, supported by Fourier transform infra-red spectroscopy, field emission scanning electron microscopy-energy dispersive X-ray microanalysis (FESEM-EDX) and scanning electrochemical microscopy (SECM) allow the identification of copper and lead corrosion materials. The mutual influence of such products is modeled upon considering uncompensated ohmic drops in the Tafel analysis of the rising portion of the respective voltammetric signals for their electrochemical reduction.

chemistry.chemical_element02 engineering and technologyLeaded copper and bronzeengineering.material01 natural sciencesMicroanalysisUncompensated ohmic dropsAnalytical ChemistryCorrosionScanning electrochemical microscopyElectrochemistryBronzeTafel analysisVoltammetryOhmic contactTafel equationVoltammetry of immobilized particles010401 analytical chemistryMetallurgy021001 nanoscience & nanotechnologyCopper0104 chemical scienceschemistryPINTURAengineering0210 nano-technologySECM
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Characterizing archaeological bronze corrosion products intersecting electrochemical impedance measurements with voltammetry of immobilized particles

2017

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) …

Materials scienceGeneral Chemical EngineeringArchaeological bronze02 engineering and technologyElectrolyteengineering.material010402 general chemistryElectrochemistry01 natural sciencesCorrosionElectrochemistryElectrochemical Impedance MeasurementsBronzeVoltammetryElectrical impedanceVoltammetry of immobilized particlesMeasurementsMetallurgy021001 nanoscience & nanotechnologyArchaeologyElectrochemical Impedance0104 chemical sciencesPINTURAElectrodeengineeringErosion corrosion of copper water tubes0210 nano-technology
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