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| Scientific Analysis on Copper Relics from Nanhai No.Ⅰ Shipwreck |
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Received:June 29, 2020
Revised:July 03, 2020
Accepted:July 05, 2020
Published Online:September 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.10.019 |
| KeyWord:Nanhai No.Ⅰ; copper cash; rust products; metallographic structure |
| Author | Institution |
| WANG Rong |
北京科技大学 |
| TIAN Xing-ling |
中国文化遗产研究院 |
| LI Xiu-hui |
北京科技大学 |
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| Abstract: |
| Copper samples of the Nanhai No.Ⅰ shipwreck in the Song Dynasty (including the Northern Song copper coins, etc.) were characterized by XRD, SEM-EDS, and metallurgical microscope. Material, manufacturing process, corrosion products and other issues of Nanhai No.Ⅰ effluent copper samples were discussed from perspective of metallurgy and chemistry combined with literature research. The results show that copper ring, copper strip and copper coin are made of copper tin lead ternary alloy, and content of tin and lead is different, and there are many sulfide inclusions. Technology of making is all casting, among which coin casting may adopt technology of sand-casting. Corrosion products of copper ware are composed of quartz (SiO2), chalcocite (Cu2S), aragonite (CaCO3), forsterite [Fe2(SiO4)], galena (PbCO3), and malachite [Cu2(OH)2CO3], etc., which have characteristics of corrosion products of copper ware in anoxic environment. |
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