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Stabilization treatment of cultural heritage artefacts : In situ monitoring of marine iron objects dechlorinated in alkali solution

Abstract : The preservation of archaeological iron artefacts necessitates stabilization treatments. For this study, such treatments were applied, in aerated and deaerated NaOH solutions, to Roman iron bars excavated from a marine site in order to understand the evolution of corrosion layers composed of ferrous hydroxychloride β-Fe2(OH)3Cl. Their transformation was monitored in situ by micro-diffraction under synchrotron radiation and characterized ex situ using multi-scale complementary analytical tools. The formation of transient phases such as ferrous hydroxide Fe(OH)2 was identified in both media and chlorinated green rust GR(Cl−) occurred in aerated solutions, showing the influence of dissolved oxygen on the transformation processes.
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Submitted on : Wednesday, December 27, 2017 - 11:56:50 AM
Last modification on : Friday, December 3, 2021 - 2:50:09 PM

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Florian Kergourlay, S. Reguer, Delphine Neff, E. Foy, F. Picca, et al.. Stabilization treatment of cultural heritage artefacts : In situ monitoring of marine iron objects dechlorinated in alkali solution. Corrosion Science, Elsevier, 2017, 132, pp.21-34. ⟨10.1016/j.corsci.2017.12.028⟩. ⟨cea-01672808⟩

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