Cit:Stahlbuhk.etal:2021

Autor	Stahlbuhk, A.; Steiger, M.
Jahr	2021
Titel	Barium nitrate as a result of the barium method and potential damage aspects
Bibtex	@inproceedings { Stahlbuhk.etal:2021, title = {Barium nitrate as a result of the barium method and potential damage aspects }, booktitle = {Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures}, year = {2021}, editor = {Lubelli, B.; Kamat, A.A.; Quist, W.J.}, pages = {99-108}, publisher = {TU Delft Open}, note = {Wall paintings represent one of the most fragile cultural treasures. Their finely porous and decorated surface is exposed to the environment and their support may be connected to ground or infiltration water, both making it susceptible to salts. While hygroscopic salts usually enter the pore network of objects via ground or infiltration water, the formation of gypsum, which is often present as a superficial crust, is the result of acidic deposition of SO2 from the environment. Even though air pollution has decreased in recent decades, many objects are still affected by these crusts, which represent a serious risk, especially for sensitive wall paintings. The“barium method” developed in the 1960s represented a huge progress in the conservation of wall paintings by successfully combining the removal of gypsum and the consolidation of the porous structure. However, pertinent literature describes the issue of hygroscopic, nitrate -containing pore solutions already present in the object that allow the formation of more soluble barium nitrate, if these nitrates were not effectively removed before the application of the method. Despite this warning, the actual damage potential of Ba(NO3)2 has not yet been investigated. This study focusses on damage aspects of barium nitrate and discusses results of damage tests and considerations of the damage related behavior of Ba(NO 3)2, also in hygroscopic salt mixtures. The results support the a ssumption that the salt poses a potential risk, which could be enhanced in mixtures with other salts. Thus, the study aims to increase the awareness of the risk of barium nitrate formation on wall paintings.}, key = {SWBSS 2021}, url = {https://predict.kikirpa.be/wp-content/uploads/2021/12/SWBSS2021_Procedings.pdf }, author = {Stahlbuhk, A. and Steiger, M.} }
DOI
Link
Bemerkungen	in:Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 99-108

Eintrag in der Bibliographie

[Stahlbuhk.etal:2021]

Stahlbuhk, A.; Steiger, M. (2021): Barium nitrate as a result of the barium method and potential damage aspects . In: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 99-108, Webadresse.

Keywords

Salt damage, barium nitrate, wall paintings, barium method, hygroscopic salts

Abstract

Wall paintings represent one of the most fragile cultural treasures. Their finely porous and decorated surface is exposed to the environment and their support may be connected to ground or infiltration water, both making it susceptible to salts. While hygroscopic salts usually enter the pore network of objects via ground or infiltration water, the formation of gypsum, which is often present as a superficial crust, is the result of acidic deposition of SO2 from the environment. Even though air pollution has decreased in recent decades, many objects are still affected by these crusts, which represent a serious risk, especially for sensitive wall paintings. The“barium method” developed in the 1960s represented a huge progress in the conservation of wall paintings by successfully combining the removal of gypsum and the consolidation of the porous structure. However, pertinent literature describes the issue of hygroscopic, nitrate -containing pore solutions already present in the object that allow the formation of more soluble barium nitrate, if these nitrates were not effectively removed before the application of the method. Despite this warning, the actual damage potential of Ba(NO3)2 has not yet been investigated. This study focusses on damage aspects of barium nitrate and discusses results of damage tests and considerations of the damage related behavior of Ba(NO 3)2, also in hygroscopic salt mixtures. The results support the a ssumption that the salt poses a potential risk, which could be enhanced in mixtures with other salts. Thus, the study aims to increase the awareness of the risk of barium nitrate formation on wall paintings.

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