Valbi, ValentinaFurcas, Fabio EnricoNeff, DelphineDillmann, PhilippeAngst, UeliKrieg, MyriamDuvauchelle, AnikaBerranger, MarionMischler, StefanoBrambilla, LauraGutknecht, NaimaDegrigny, Christian2024-05-012024-05-012024-05-012024-03-0810.1016/j.corsci.2024.111946https://infoscience.epfl.ch/handle/20.500.14299/207692WOS:001202446500001The corrosion mechanisms of a Roman iron bezel ring were investigated by in-depth characterization of its uncommon corrosion pattern and thermodynamic modelling. A silver foil and altered glass remnants were identified, covered with thick strata of magnetite and goethite. Underneath it, was a multi-millimetric cavity, filled with spheroidal magnetite or magnetite/goethite nodules in a siderite matrix. The bottom of the preserved object showed a marbled corrosion structure composed of goethite, magnetite/maghemite and hematite. Heterogeneous and evolving local conditions, involving synergistic effects of electrolytic and dissolution/precipitation mechanisms might explain the unique morphology and nature of the corrosion products observed.TechnologyIron (A)Silver (A)Sem (B)Raman Spectroscopy (B)Interfaces (C)Oxidation (C)text::journal::journal article::research article