高青陈庄遗址M35、M36出土青铜器腐蚀特征初步分析

Preliminary analysis on corrosion characteristics of bronzes unearthed from M35 and M36 at Chenzhuang Site

高青陈庄遗址M35、M36出土的青铜器具有黑色锈蚀等特殊的腐蚀现象。本研究在对这两个墓出土青铜器腐蚀现象统计分析的基础上,对其典型的腐蚀特征进行了总结,并进行了相应的科技检测分析。得知,这两个墓葬土壤中可溶性硫酸盐的含量很高;青铜器中含有大量的S;其黑色腐蚀产物为铜硫化物;闪亮颗粒物为结晶良好的铜硫化物,晶粒为平行的板片状集合体;含有大量的“铜”,纯铜颗粒和纯铜片的显微结构形貌与铜硫化物相同;铜器所带有的绿色调和绿色锈点为硫酸盐矿物结晶所致;基体表层黄白、灰白色锈蚀中含有铜锡合金;铜器很少检测出氯离子。

The bronzes unearthed from Tomb M35 and M36 at Chenzhuang Site of Gaoqing County,Shandong Province,exhibit special corrosion phenomena,specifically black rust.Analysis of the corrosion products on these bronzes show that 1)the soluble sulfate content of the soil of the two tombs is very high;2)the content of sulfur in the bronzes is very high;3)the black rust is a compound of copper and sulfur;4)the shiny particles are well-crystallized forms of copper and sulfur and the grains are parallel plate-shaped aggregates;5)there is a lot of“copper”present,and the microstructures of the pure copper particles and the pure copper sheet are the same as that of compound of copper and sulfur;6)the green tone and green rust spots on the bronzes ware were caused by the crystallization of sulfate minerals;7)a copper-tin alloy is contained in the yellow white and gray white rust on the surface of matrix and 8)chloride ions are rarely detected in bronzes.