Microfocus X-ray computed tomography analysis of corroded glass objects |
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| Authors: | Florias Mees Etienne Cornelis Patric Jacobs Maria Teresa Domnech Crbo Hannelore Rmich |
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| Institution: | aDepartment of Geology and Soil Science, Ghent University, Krijgslaan 281 S8, B-9000 Ghent, Belgium;bDepartment of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;cDepartment of Architectural Heritage, Polytechnical University of Valencia, Camino de Vera s/n, E-46022 Valencia, Spain;dFraunhofer-Institute for Silicate Research, Bronnbach Branch, D-97877 Wertheim, Germany |
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| Abstract: | Microfocus X-ray computed tomography (µCT) is a useful tool for non-destructive analysis of corroded archaeological glass objects and for monitoring restoration and conservation processes for these materials. This was demonstrated by µCT analysis of artificially corroded laboratory-produced glasses and corroded archaeological glasses retrieved from soil environments. Corrosion layers with a thickness of 20 µm or more can be detected as areas with lower X-ray attenuation values than the non-corroded glass. Features that are revealed by µCT analyses include the degree and patterns of corrosion and the presence of various internal structures in the corrosion layers. The study of restored corroded glasses demonstrates that mechanical and laser cleaning can be monitored efficiently. The study of consolidation practices, using test objects, requires the use of additives to increase X-ray attenuation values of the organic compounds that are used. |
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| Keywords: | X-ray computed tomography Glass Corrosion Conservation |
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