Stabilization treatment of cultural heritage artefacts : In situ monitoring of marine iron objects dechlorinated in alkali solution
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20 décembre 2017
- handle: 10670/1.48b97y
- cea-01672808
- doi: 10.1016/j.corsci.2017.12.028
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.corsci.2017.12.028
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Florian Kergourlay et al., « Stabilization treatment of cultural heritage artefacts : In situ monitoring of marine iron objects dechlorinated in alkali solution », HAL-SHS : archéologie, ID : 10.1016/j.corsci.2017.12.028
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Résumé
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.