Study of iron sulphides in long-term iron corrosion processes: Characterisations of archaeological artefacts

Sophie Grousset; Marine Bayle; Alexandre Dauzeres; Didier Crusset; Valérie Deydier; Yannick Linard; Philippe Dillmann; Florence Mercier-Bion; Delphine Neff

doi:10.1016/j.corsci.2016.07.022

Study of iron sulphides in long-term iron corrosion processes: Characterisations of archaeological artefacts

Sophie Grousset ^{1, 2} Marine Bayle ^{1, 2} Alexandre Dauzeres ³ Didier Crusset ⁴ Valérie Deydier ⁴ Yannick Linard ⁴ Philippe Dillmann ^{1, 2} Florence Mercier-Bion ^{1, 2} Delphine Neff ^{1, 2}

1 IRAMAT - Institut de Recherches sur les Archéomatériaux

2 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération

NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)

3 IRSN - Institut de Radioprotection et de Sûreté Nucléaire

4 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs

Abstract : Iron sulphides are observed on long term anoxic corrosion profiles of iron artefacts. The archaeological nails studied came from two terrestrial sites (Glinet and Raadhuspladsen) and a subaquatic one (Arles-Rhône 3). Greigite (Fe 3 S 4) and/or mackinawite (FeS 1−x) are observed at the outer border of the corrosion product layer. The presence of mackinawite is discussed relatively to the establishment of stable anoxic burial conditions. The nails from the subaquatic site present pyrite globules in the transformed medium. The formation of pyrite (FeS 2) is attributed to the proximity of wood. The iron sulphides formation may also be explained by the presence of sulphate-reducing bacteria in the burial environment.

Keywords : B SEM B Raman spectroscopy A Iron A Steel C Microbiological corrosion Sulphuric acid

Document type :

Journal articles

Domain :

Chemical Sciences / Material chemistry

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https://hal-cea.archives-ouvertes.fr/cea-01377025
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Submitted on : Thursday, October 6, 2016 - 10:47:46 AM
Last modification on : Wednesday, December 18, 2019 - 8:32:02 PM

Study of iron sulphides in long-term iron corrosion processes: Characterisations of archaeological artefacts

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Study of iron sulphides in long-term iron corrosion processes: Characterisations of archaeological artefacts

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