Characterization of traditional artificial patinas on copper using the voltammetry of immobilized particles

[EN] The voltammetry of immobilized particles methodology (VIMP) is used to characterize the composition of artificial patinas on copper. The voltammetric response of carbonate-, nitrate-, chloride-, sulfate-, and sulfide-based patinas is described using sub-microsamples attached to graphite electrodes in contact with aqueous acetate buffer. Patina-characteristic voltammetric profiles are obtained for the different artificial patinas that can be recognized using the generalized Tafel analysis of the voltammetric curves. VIMP data could also provide layer-by-layer information about composition and compactness/crystallinity of the patinas for which a simplified theoretical modeling is presented.Authors gratefully acknowledge funding from Project CTQ2017-85317-C2-1-P, supported with Ministerio de Economia, Industria y Competitividad (MINECO), Fondo Europeo de Desarrollo Regional (ERDF) and Agencia Estatal de Investigacion (AEI); and project TOP-HERITAGE CM (S2018/NMT_4372) from Comunidad de Madrid and European Structural and Investment Funds. B. R.-B. and E.C. would like to professional support of the CSIC Interdisciplinary Thematic Platform "Open Heritage: Research and Society" (PTI-PAIS).Doménech-Carbó, A.; Ramírez-Barat, B.; Petiti, C.; Goidianich, S.; Domenech Carbo, MT.; Cano, E. (2020). Characterization of traditional artificial patinas on copper using the voltammetry of immobilized particles. 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