Research on the corrosion product layer of bronzes excavated from Yejiashan Cemetery in Suizhou
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(1. The Department of Archaeology and Anthropology, University of the Chinese Academy of Sciences, Beijing 100049, China;2. Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;3. Tianjin Museum, Tianjin 120000, China;4. Hubei Provincial Institute of cultural relics and Archaeology, Wuhan 430077, China)

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    Abstract:

    In our study, ultra-depth video microscopy, X-ray fluorescence spectrometry (XRF), ion chromatography (IC), Raman spectrometry (Raman) and scanning electron microscopy with energy dispersive spectrometry mapping (SEM-EDS mapping) were applied to analyze the corrosion on six representative samples of bronzes excavated from Yejiashan Cemetery of the early Western Zhou Dynasty. The results show that the burial environment of most tombs in Yejiashan Cemetery is neutral to weakly acid and low in chlorine, which protected bronzes from corrosion. The structures of the corrosion products are complicated, consistent with the results from the water-corrosion imitating experiments. The only tomb having an alkaline and rich-chlorine environment is M46. The powdery corrosion products of the sample from this tomb contains harmful corrosion belonging to the type Ⅱ “coarse surface”, which suggests that some effective measures should be taken to protect bronzes from this tomb. This study combines Raman spectrometry and SEM-EDS mapping analysis to indicate the corrosion layers of ancient Chinese bronzes; the results show that the methods could be applied to investigate the corrosion layer structure of bronzes quickly, efficiently and specifically.

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History
  • Received:December 06,2018
  • Revised:October 04,2019
  • Adopted:
  • Online: July 15,2020
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