Search

Your search keyword '"Eggert, Gerhard"' showing total 15 results
Start Over Author "Eggert, Gerhard" Journal studies in conservation
15 results on '"Eggert, Gerhard"'

1. Sustainable and Beneficial: Pollutant Absorption and Relative Humidity Control in Display Cases by Saturated Salt Solutions.

Author

Eggert, Gerhard, Brieger, Oliver, Marschibois, My Sa, Becker, Daniel, Bur, Christian, Siebel, Katja Franziska, and Grieb, Heiner

Subjects
*METAL oxide semiconductors, *SOLUTION (Chemistry), *ENVIRONMENTAL engineering, *HUMIDITY control, *GAS detectors
Abstract

In the light of sustainability, the nearly forgotten control of relative humidity (RH) in display cases with saturated salt solutions is re-evaluated. Spilling and creeping of salts can be avoided. By choosing magnesium nitrate or potassium carbonate, the temperature dependence of the RH and the emission of harmful gases are negligible. Measurements with metal oxide semiconductor (MOS) gas sensors showed such solutions to be excellent absorbers for corrosive pollutants such as acids and aldehydes, especially the alkaline potassium carbonate (hitherto not used in museums). The practical application of such solutions in display cases is currently being tested in a community science project in a number of museums. This will result in improved guidelines for conservators and it is hoped, in a revival of this passive, failsafe, low-carbon footprint technique. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

9. When Glass and Metal Corrode Together, VI: Chalconatronite.

Author

Fischer, Andrea, Eggert, Gerhard, and Stelzner, Jörg

Subjects
*COPPER alloys, *FORMALDEHYDE, *GLASS, *CHRISTMAS trees, *SODIUM carbonate, *METALS
Abstract

Chalconatronite, Na2[Cu(CO3)]2·3H2O, is formed as a corrosion product when copper alloys are exposed to sodium carbonate solutions in the air. This also happens when metals come into contact with corroding soda glass which forms alkaline surface films in reaction with humidity from clean air. More often, substantial amounts of formaldehyde are present indoors which react to formate via the Cannizzarro reaction and accumulate over time in the films. Twenty cases of chalconatronite (including two mentioned in the literature) are reported as occurring on heritage objects with glass in contact with copper alloys: Baroque reliquaries with set glass gems, enamel on metal (sixteenth century and a modern replica of intentionally unstable composition), Christmas tree glass baubles with wires, glass buttons with metal shanks, a glass figure with a wire support, miners' lamps, and a glass framed daguerreotype. These confirmed identifications might help conservators in investigating similar cases to shed more light on the formation conditions. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

12. Poster summaries

Author

Bachlechner, Claudia, primary, Krist, Gabriela, additional, Kapferer, Martin, additional, Baker, Wendy, additional, Belishki, Stefan, additional, Bidarra, Ana, additional, Antunes, Pedro, additional, Desterro, Teresa, additional, Coroado, João, additional, Rocha, Fernando, additional, Chan, Emma, additional, Cheung, Angela, additional, Tsang, Alice, additional, Sam, Louise, additional, Chlumská, Štěpánka, additional, Novotná, Miroslava, additional, Šefcu˚, Radka, additional, Coelho, Daniela, additional, Saraiva, Sandra, additional, Baltazar, Vera De La Cruz, additional, Villa, Mayra Elitania Galan, additional, Eipper, Paul-Bernhard, additional, Elnaggar, Abdelrazek, additional, Fitzsimons, Paul, additional, Nevin, Austin, additional, Osticioli, Iacopo, additional, Ali, Mona, additional, Watkins, Ken, additional, Eremin, Katherine, additional, Chloros, Jessica, additional, Mason, Robert, additional, Chang, Angela, additional, Lie, Henry, additional, McWilliams, Mary, additional, Sigel, Anthony, additional, Yoltar, Aysin, additional, Fischer, Andrea, additional, van Giffen, Astrid, additional, Eggert, Gerhard, additional, Frank, David, additional, Franková, Jarmila, additional, Frieden, Vanessa, additional, Radujkovic, Sonja, additional, Rütt, Dunja, additional, Schulz, Anette, additional, Frøysaker, Tine, additional, Mengshoel, Karen, additional, Kempton, Hanne Moltubakk, additional, Gianoli, Savina, additional, Fulgoni, Giovanna, additional, Ghizzoni, Francesca, additional, Salvatori, Sabrina, additional, Weber, Johannes, additional, Guzowska, Anna, additional, Heginbotham, Arlen, additional, Piening, Heinrich, additional, Von Engelhardt, Clara, additional, Grzywacz, Cecily, additional, Hughes, Gary, additional, Smith, Michael, additional, Jagić, Romana, additional, Cvetković, Siniša, additional, Bogović, Srebrenka, additional, Kerschner, Richard L., additional, Ravenel, Nancie, additional, Kita, Yuko, additional, Fructuoso Hernández, Gonzalo J., additional, Matsui, Toshiya, additional, Montes, Luis Torres, additional, García, Manuel Reyes, additional, Kousoulou, Tatiana, additional, Kuvvetli, Filiz, additional, Kilercik, Ays¸e Aldemir, additional, Öncel, Çinar, additional, Taralp, Alpay, additional, Özgörüs¸, Nurçin Kural, additional, Liu, Wai-Sum, additional, Ljubic, Valentina, additional, Kautek, Wolfgang, additional, Raedel, Martina, additional, Buecker, Michael, additional, Chan, Roland, additional, Ramnauth, Belinda T. K., additional, Roby, Thomas, additional, Friedman, Leslie, additional, Alberti, Livia, additional, Caldi, Cristina, additional, Carbonara, Ermanno, additional, Chaouali, Moheddine, additional, Sauerberg, Marie Louise, additional, Broecke, Lara, additional, Marchant, Ray, additional, Stock, Alison, additional, Melcher, Michael, additional, Vetter, Wilfried, additional, Wei, Shuya, additional, Murr, Beate, additional, Schreiner, Manfred, additional, Schwarz, Cynthia, additional, Bori, Tahereh Shisheh, additional, Boroujeni, Hamid Farahmand, additional, Abed-Esfahani, Abbs, additional, Škarić, Ksenija, additional, Solberg, Kristin, additional, Verweij, Edwin, additional, Risåsen, Geir Thomas, additional, Takeda, Akiko, additional, Akanuma, Hideo, additional, Tsuchiya, Nobutaka, additional, Tennent, Norman H., additional, Bicaci, Lisya, additional, Dowsett, Nicky, additional, Izadan, Hossein, additional, van Lookeren, Kate, additional, Nobbs, James, additional, Pak, Lina, additional, Top, Marijke, additional, Tsipotas, Dimitris, additional, Michalaros, Christoforos, additional, Tuna, Indra, additional, Saulesleja, Indra, additional, Knothe, Florian, additional, Wang, Quanyu, additional, and van Bellegem, Maickel, additional

Published
2012
Full Text
View/download PDF

15. Glass-induced metal corrosion on museum exhibits (GIMME project).

Author

Fischer, Andrea, van Giffen, Astrid, and Eggert, Gerhard

Subjects
CORROSION & anti-corrosives, CORROSION prevention, PRESERVATION of glass, MUSEUM exhibits, MUSEUM exhibit design & construction, CONSERVATION & restoration
Abstract

The article examines glass-induced metal corrosion on museum exhibits. Particular focus is given to relates to decorative art objects. Additional topics discussed include objects that contain unstable glass in contact with metals, glass and metal conservation techniques and the GIMME project, which aims to preserve decorative arts heritage.

Published
2012

Catalog

Books, media, physical & digital resources
See catalog results