Investigation of the foil structure and corrosion mechanisms of modern Zwischgold using advanced analysis techniques

Journal article
(Original article)


Publication Details

Author(s): Wu Q, Soppa K, Scherrer N, Watts B, Yokosawa T, Bernard L, Araki T, Doebeli M, Meyer M, Spiecker E, Fink R
Journal: Journal of Cultural Heritage
Publisher: Elsevier Masson SAS
Publication year: 2018
ISSN: 1296-2074


Abstract


Zwischgold is a two-sided metal foil made by adhering a gold leaf over a silver leaf to present a gold surface while using less gold than gold foils. Corroded Zwischgold surfaces appear dark, accompanied by gloss loss and possible mechanical stability issues. Zwischgold applied artefacts are commonly found in museums and churches across Europe and they currently face an uncertain future as conservators have little knowledge to base conservation treatments on. We present a comprehensive material analysis of Zwischgold models through advanced characterization techniques including focused ion beam coupled with scanning electron microscopy (FIB-SEM), transmission electron microscopy (TEM), scanning transmission X-ray microscopy (STXM), time-of-flight secondary ion mass spectrometry (TOF-SIMS) and Rutherford backscattering spectrometry (RBS). Complementary information on the foil thickness, sharpness of the gold-silver interface, gold purity, and the formation as well as distribution of corrosion products on Zwischgold models have been obtained, representing a starting point for understanding the morphology and the long-term chemistry of Zwischgold artefacts.



FAU Authors / FAU Editors

Fink, Rainer Prof. Dr.
Professur für Physikalische Chemie
Meyer, Markus
Professur für Physikalische Chemie
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Yokosawa, Tadahiro Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Additional Organisation
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


External institutions with authors

Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich


How to cite

APA:
Wu, Q., Soppa, K., Scherrer, N., Watts, B., Yokosawa, T., Bernard, L.,... Fink, R. (2018). Investigation of the foil structure and corrosion mechanisms of modern Zwischgold using advanced analysis techniques. Journal of Cultural Heritage. https://dx.doi.org/10.1016/j.culher.2017.12.005

MLA:
Wu, Qing, et al. "Investigation of the foil structure and corrosion mechanisms of modern Zwischgold using advanced analysis techniques." Journal of Cultural Heritage (2018).

BibTeX: 

Last updated on 2019-27-05 at 16:54