Electrical properties of iron corrosion layers formed in anoxic environments at the nanometer scale

Florence Mercier-Bion 1, 2, * Jiaying Li 1, 2 Hélène Lotz 1, 2 Ludovic Tortech 3, 4 Delphine Neff 1, 2 Philippe Dillmann 1, 2
* Corresponding author
1 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 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
4 E-POM - Edifices PolyMétalliques
IPCM - Institut Parisien de Chimie Moléculaire
Abstract : The electrical properties of the corrosion layers on archaeological iron artefacts were determined by Conductive Atomic Force Microscopy. Different corrosion products were studied: Fe$^{II}$ carbonates, magnetite entrapped in the carbonate, and iron sulfides. The results indicate that the ferrous carbonate matrix is insulating, and that magnetite and iron sulfides have a conductive character, although these phases are not systematically connected to the metal. This suggests that electrons produced by the anodic dissolution of metal would be conducted to the external part of the corrosion product layer through a three-dimensional network of connected magnetite strips passing through the ferrous carbonate matrix.
Document type :
Journal articles
Complete list of metadatas

Cited literature [34 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-01743218
Contributor : Serge Palacin <>
Submitted on : Tuesday, March 27, 2018 - 10:57:38 AM
Last modification on : Tuesday, July 9, 2019 - 10:13:33 AM
Long-term archiving on : Thursday, September 13, 2018 - 9:20:52 AM

File

MERCIER-BION_et al_manuscript_...
Files produced by the author(s)

Identifiers

Citation

Florence Mercier-Bion, Jiaying Li, Hélène Lotz, Ludovic Tortech, Delphine Neff, et al.. Electrical properties of iron corrosion layers formed in anoxic environments at the nanometer scale. Corrosion Science, Elsevier, In press, 137, pp.98-110 ⟨https://www.sciencedirect.com/science/article/pii/S0010938X17312544⟩. ⟨10.1016/j.corsci.2018.03.028⟩. ⟨cea-01743218⟩

Share

Metrics

Record views

371

Files downloads

91