Raman structural imaging of the sample Am XXX S.(a) Optical microphotograph with the location of the scanned area (C5). Semi-quantitative results obtained from spectral decomposition by LADIR-CAT program for (b) goethite (c) hydrated Fe(III) oxi-(hydroxi)de
(d) lepidocrocite (e) akaganeite
Raman structural imaging can extract original information in order to answer new questions raised in the recent studies on
iron and low alloy steel corrosion. Up to now, this technique has allowed the extraction of the qualitative distribution of the
compounds constituting the corrosion product layers.Wepropose here amethodology to extract quantitative parameters from Raman hyperspectral maps, executed by a home-developed software: LADIR-CAT. Specifically developed for iron corrosion quantitative component imaging, the approach and program operation are described. The LADIR-CAT is applied on ancient corroded iron samples originating from the Amiens cathedral (France) to establish the description and the composition of the corrosion systemthrough quantitative compound imaging.
Monnier, J., Bellot-Gurlet, L., Baron, D., Neff, D., Guillot, I., Dillmann, P., 2011. A methodology for Raman structural quantification imaging and its application to iron indoor atmospheric corrosion products, Journal of Raman Spectroscopy, 23-42.
• Matériaux des nouvelles technologies pour l’énergie › Corrosion long terme de matériaux métalliques / Long term corrosion of multimaterials containing metals › Solids, surfaces interfaces and materials Physique, chimie, nanosciences et matériaux autour des grands instruments
• UMR 3299 - Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux • Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux
• Laboratoire archéomatériaux et prévision de l'altération (LAPA)