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Non-destructive in situ Raman spectroscopic investigation of corrosion products on the bronze dagger-axes from Yujiaba site in Chongqing, China

机译:玉济坝在重庆市重庆市青铜匕首轴上的腐蚀产品的原位拉曼光谱研究

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摘要

Corrosion products on 23 bronze dagger-axes unearthed from different tombs dating to the Warring States period at Yujiaba site, Kai County, Chongqing, China, were characterized non-destructively by Raman spectroscopy and optical microscopy (OM). The results showed that Cu corrosion products such as Cu hydroxide sulfate, Cu hydroxide carbonate, Cu hydroxide phosphate, Cu chloride hydroxide, Cu sulfide, Cu oxide, Pb corrosion products such as Pb oxide, Pb carbonate and Pb chlorine phosphate/arsenate (Pb-5((As,P)O-4)(3)Cl), and Sn oxide were all detected. Of 23 bronze dagger-axes, 15 were found with mimetite-pyromorphite, whereas 2 with Cu chloride hydroxide may indicate that chlorine ion can combine with Pb more easily than Cu in this special environment. Sulfate ion, phosphoric ion, chloride ion, carbonate ion or bicarbonate ion, and microorganism in the buried environment are the main factors which influenced the formation of corrosion products. Because these bronze dagger-axes were all unearthed in the tombs, the phosphoric ion in the buried environment should come from hydroxyapatite (Ca-5(PO4)(3)OH) which is the main inorganic phase of human bones and teeth in the tombs.
机译:通过拉曼光谱和光学显微镜(OM),腐蚀产品来自于玉器玉器网站的不同墓葬,以至于中国重庆市凯县的武家坝网站的交战典礼。结果表明,Cu腐蚀产品如Cu氢氧化物,Cu氢氧化物碳酸盐,Cu氢氧化物,Cu氢氧化物,Cu硫化物,Cu硫化物,Cu氧化物,Pb腐蚀产品,如PB氧化物,PB碳酸盐和PB氯磷酸盐/砷酸盐(PB-均检测5((AS,P)O-4)(3)Cl)和SN氧化物。在23个青铜匕首轴上,用Mimetite-Pyromorphite发现15,而2氢氧化物氢氧化物可能表明氯离子可以比该特殊环境中的铜更容易地与Pb相结合。硫酸根离子,磷离子,氯离子,碳酸根离子或碳酸氢盐离子,以及埋地环境中的微生物是影响腐蚀产品形成的主要因素。因为这些青铜匕首轴都是在墓葬中出土的,所以埋藏环境中的磷酸离子应该来自羟基磷灰石(CA-5(PO4)(3)哦),这是墓葬中的人体骨骼和牙齿的主要无机阶段。

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