Étude du mécanisme de corrosion atmosphérique à long terme des aciers: nouvelles stratégies de protection des aciers du patrimoine culturel

Abstract : The present report relates to the understanding of long term atmospheric corrosion mechanisms of low alloy steels which are necessary for various applications such as the interim storage of nuclear waste, and the conservation of cultural heritage artefacts. At a first stage, it may be necessary to characterize ancient corrosion system in order to identify the reactive phases in the rust layers, their localisation and their role in the mechanism. In that purpose, the work on objects reference archaeological sites (analogues) can help to take sample of studies. At a second stage, the electrochemical behaviour and their reactive of the phases constitutive of the corrosion layer must be determined precisely. In that field, it is necessary to combine the study of the pure phases and the powders taken on the analogues. The localisation of oxygen reduction sites in the rust layer is a very pertinent tool. To that end, specific experiments have been set up to re-corrode the ancient samples in marked medium (using 18O2), were investigated by nuclear reaction analysis. Finally, the identification of these newly-formed phases give precious information to develop new methods of inhibition of long term corrosion. It concerns only the heritage
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Hadri Faiz. Étude du mécanisme de corrosion atmosphérique à long terme des aciers: nouvelles stratégies de protection des aciers du patrimoine culturel. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0314⟩. ⟨tel-01749898⟩

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