Dating archaeological copper using electrochemical impedance spectroscopy. Comparison with voltammetry of microparticles dating
| Autor: | J. Barrio, M. T. Doménech-Carbó, Sofia Capelo, Antonio Doménech-Carbó, J. Piquero, A. Fuentes, W. Al Sekhaneh |
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| Rok vydání: | 2015 |
| Předmět: |
Cuprite
Materials science Calibration curve Analytical chemistry chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion Materials Chemistry Environmental Chemistry Bronze Voltammetry Mechanical Engineering Metals and Alloys General Medicine Rate equation 021001 nanoscience & nanotechnology Copper Archaeology 0104 chemical sciences Surfaces Coatings and Films Dielectric spectroscopy chemistry Mechanics of Materials visual_art visual_art.visual_art_medium engineering 0210 nano-technology |
| Zdroj: | Materials and Corrosion. 67:120-129 |
| ISSN: | 0947-5117 |
| Popis: | A methodology for dating copper/bronze archaeological objects aged under atmospheric environments using electrochemical impedance spectroscopy (EIS) is described. The method is based on the measurement of resistance associated to the growth of corrosion layers in EIS recorded upon immersion of the pieces in mineral water and applying a bias potential for the reduction of dissolved oxygen. Theoretical expressions for the time variation of such resistance following a potential rate law are presented. Equivalent expressions are derived and applied for estimating the variation of the tenorite/cuprite ratio from their specific voltammetric signals using voltammetry of microparticles data. Calibration curves were constructed from a set of well-documented coins. |
| Databáze: | OpenAIRE |
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