Influence of water contained in porous limestone on corrosion |
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| Institution: | 1. SC Ceprocim SA, 6 Preciziei Blvd, 6-Bucharest 062203, Romania;2. National Arts University, 19 General Budişteanu, 1-Bucharest 010773, Romania;3. Institute of Biology, Romanian Academy, 296 Spl Independentei, 1-Bucharest 060031, Romania;4. National Museum of Romanian History, Centre of Research and Scientific Investigation, 12 Calea Victoriei, 030026 3-Bucharest, Romania;5. Faculty of Applied Chemistry and Materials Science Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 1-7,Gh. Polizu str., 1-Bucharest 11061,Romania;6. Metav Research Development srl, 31 C.A. Roseti Str., Sector 2, Bucharest 020011, Romania;1. CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Rome, Italy;2. University of Rome Tor Vergata, Physics Department and Centro NAST, Rome, Italy;3. Consiglio Nazionale delle Ricerche, Istituto di Fisica Applicata “Nello Carrara”, Sesto Fiorentino, Italy;4. Consiglio Nazionale delle Ricerche, Istituto per i Processi Chimico Fisici, Messina, Italy;5. UCL-Institute of Archaeology, London, United Kingdom |
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| Abstract: | The chemical degradation of porous limestone due to its reaction with sulphur dioxide was investigated by determining amounts and distributions of sulphur-containing corrosion products in samples collected from historic buildings. Water vapour adsorption equilibria have been determined for limestones of varying petrology, and correlated with sulphur dioxide uptakes measured in artificial weathering experiments. Out of several possible routes of the corrosive reaction, dissolution of sulphur dioxide in bulk water present in the stone may be related to the prevailing mechanism leading to stone deterioration. The bulk water may appear in the limestone as water condensed in the capillaries, or absorbed by hygroscopic salts. |
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