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- Title
Crossing VIMP and EIS for studying heterogeneous sets of copper/bronze coins.
- Authors
Di Turo, Francesca; Parra, Rafael; Piquero-Cilla, Joan; Favero, Gabriele; Doménech-Carbó, Antonio
- Abstract
Electrochemical impedance spectroscopy (EIS) and voltammetry of immobilized particles (VIMP) measurements using air-saturated mineral water and 0.10 M NaClO4 aqueous solution as electrolytes were applied to eurocent coins and a set of copper/bronze coins from the late nineteenth century exhibiting significant heterogeneity in their degree and type of corrosion. The obtained data presented satisfactory repeatability being fitted to relatively simple equivalent circuits which were dependent on the electrolyte and bias potential, the more satisfactory conditions being obtained using the reduction of dissolved oxygen as a redox probe. Consistent data were obtained using VIMP and EIS characterizing different corrosion patterns, and establishing the possibility of discriminating different monetary emissions in favorable cases of high level of corrosion.
- Subjects
COPPER coins; BRONZE coins; IMPEDANCE spectroscopy; AQUEOUS solutions; CORROSION &; anti-corrosives
- Publication
Journal of Solid State Electrochemistry, 2019, Vol 23, Issue 3, p771
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-018-04182-5