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Liu, Liu; Zhong, Qing; Jiang, Luman; Li, Pei; Xiao, Lin; Gong, Yangmin; Zhu, Zhanyun; Yang, Junchang
Heritage science, 03/2022, Letnik: 10, Številka: 1Journal Article
Located in Pujiang, Chengdu, China, more than four hundred artifacts were unearthed during the excavation of the Warring States (the Warring States period lasts from 475 to 221 BC) ship-shaped graves in 2016. The compositional and metallurgical feature of the unearthed vessels are still unclear. Archaeologists and conservators are puzzled by such problems that need to be answered by systematic scientific studies. Fifty one samples, either from the matrix (26 samples), or from the corrosion part (25 samples) of 25 unearthed bronze vessels, were carefully collected from the fallen part of the bronze vessels for analysis. Technical methods, such as OM, SEM-EDS, XRD and Raman Spectroscopy were adopted for compositional and metallurgical characterization of the bronzes, as well as identification of the corrosion products. The bronzes are Cu–Sn–Pb trinary alloys with typical casting microstructure. The proportion of Sn are in accordance with excavated bronze vessels in surrounding areas. Recycling isn’t involved with the production of such vessels. Layered structure of the corrosion products was observed. Different corrosion products were identified as Cu 2 CO 3 (OH) 2 , Cu 2 O, CuSO 4 ·5H 2 O SnO 2 , PbSO 4 and PbCO 3 . The findings help us gain insights into the bronze manufacturing in Bashu district, as well as the corrosion behavior in certain condition.
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in: SICRIS
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