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Article Dans Une Revue Corrosion Science Année : 2024

Unique corrosion behavior of an archaeological Roman iron ring: Microchemical characterization and thermodynamic considerations

Résumé

The 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.
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Dates et versions

hal-04498697 , version 1 (11-03-2024)

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Valentina Valbi, Fabio Enrico Furcas, Delphine Neff, Philippe Dillmann, Ueli Angst, et al.. Unique corrosion behavior of an archaeological Roman iron ring: Microchemical characterization and thermodynamic considerations. Corrosion Science, 2024, 231, pp.111946. ⟨10.1016/j.corsci.2024.111946⟩. ⟨hal-04498697⟩
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