Efficiency of applying ammonium oxalate for protection of monumental limestone by poultice, immersion and brushing methods

Mudronja, Domagoj and Vanmeert, Frederik and Hellemans, Kevin and Fazinić, Stjepko and Janssens, Koen and Tibljaš, Darko and Rogošić, Marko and Jakovljević, Suzana (2013) Efficiency of applying ammonium oxalate for protection of monumental limestone by poultice, immersion and brushing methods. = Efficiency of applying ammonium oxalate for protection of monumental limestone by poultice, immersion and brushing methods. Applied Physics A: Materials Science and Processing, 111 (1). pp. 109-119. ISSN 0947-8396. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q2 (2013). Točan broj autora: 8.

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Official URL: http://link.springer.com/article/10.1007/s00339-01...

Abstract

Samples of cretaceous limestone have been treated with three application methods (poultice, immersion and brushing) using different concentrations of ammonium oxalate solution (AmOx) and varying treatment time in order to test the efficiency of surface and in-depth formation of a protective layer of calcium oxalate (CaOx). Synchrotron-based microanalytical techniques (SR-μXRD with 12.5 μm×7.5 μm (H×V) probe size, SR-μFTIR with 10 μm×10 μm and 8 μm×20 μm probe sizes) and laboratory μFTIR, XRD and SEM have been employed for analysis of the treated samples. Synchrotron-based techniques showed variations in the CaOx distribution along the surface on a micrometer scale. All treatments resulted in the development of a CaOx layer with a maximum thickness of approximately 40 μm. Application by the brushing method with 10 1-min applications with 5-min breaks during one hour showed a development of the calcium oxalate layer equivalent to the poultice treatment taking 10 h. This treatment could be preferred for large marble or limestone surfaces where poultice usage is economically not feasible. © 2012 Springer-Verlag Berlin Heidelberg.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Ammonium oxalate; Application method; Calcium oxalates; Maximum thickness; Micro-analytical techniques; Micrometer scale; Protective layers; Synchrotron based techniques; Calcium; Limestone; Probes; Synchrotron radiation; Oxalic acid
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Chemistry
TECHNICAL SCIENCE > Geodesy
Divisions: 1000 Department of Materials > 1010 Chair of Materials and Tribology
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Quartiles: Q2 (2013)
Date Deposited: 06 May 2015 11:42
Last Modified: 04 Mar 2016 13:57
URI: http://repozitorij.fsb.hr/id/eprint/4060

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