文章基本信息

标题：The Liesegang Effect on Ancient Bronze Items Discovered in Romania
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作者：I. Sandu ; O. Mircea ; I.G. Sandu 等
期刊名称：International Journal of Conservation Science
印刷版ISSN：2067-533X
电子版ISSN：2067-8223
出版年度：2013
卷号：4
期号：Special Issue
页码：573-586
出版社：Alexandru Ioan Cuza University of Iasi
摘要：Most archaeological bronze items discovered in recent years in Moldova and Dobrogea (Romania) have corrosion crusts on their surface, concentrically or radially stratified. This phenomenon, known as the Liesegang effect, manifests itself differently in regard to its extension, stratification and disposition, according to the base alloy composition, the nature of the primary patina and the conservation state at abandonment, as well as to the soil conditions and soil aggressiveness. In our study, in which we used OM and SEM-EDX analysis, we found a 3D spatial distribution of the different Liesegang effects, each layer being formed from a separate dominant compound, contaminated with the main compound of the neighboring layer. The objects that are totally corroded, without a metallic core, it has a central gray-colored compound, which contains chlorine and l tin, with a greatly reduced composition of copper, compared to the base alloy, over which there formed mineralized layers of cuprite, malachite, azurite, nantokite, atacamite, paratacamite etc.. The morphology and distribution of the layers is determined by the shape of the original object and the processing technique used for its manufacture.
关键词：Ancient bronze objects; Liesegang effect; Primary; secondary and contamination patina; OM; SEM-EDX