Study on Unearthed Bronzes Relics of Xizhou Dynasty, China
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6WXG\RQ8QHDUWKHG%URQ]HV5HOLFVRI;L]KRX'\QDVW\&KLQD Chen Zhangru Wen Zhijian Fan Guang Liu Yuemiao Beijing Research Institute of Uranium Geology, 100029, Beijing, China $%675$&7 Engineered barrier for HLW repository is composed of the waste form, the canister and the buffer/backfill material. Assessment of the applicability of metal as candidate materials of canister for HLW has been conducted in some countries. Many bronze relics from the XiZhou Dynasty, China, dated from more than 3,000 years ago, have been preserved perfectly. The study on the corrosion of the bronze relics could contribute to the material selection and design of canisters for HLW. The corrosion products of ancient bronzes consist of copper carbonate hydrate, lead carbonate, copper oxides etc. The corrosion mechanism of the substrate was mainly characterized by electrochemical corrosion, whereas the corrosion mechanism of surface layers was characterized by direct chemical corrosion and electrochemical corrosion. ,1752'8&7,21 The disposal concept for high level radioactive waste involves isolating the waste from the biosphere by a series of engineered and natural barriers. The natural barrier is the geological formation in which the repository is located. The engineered barriers are composed of the waste form, the canister and the buffer/backfill material. Assessment of the applicability of metal as candidate materials of canister for HLW has been conducted in many countries, such as Sweden, Japan, United States among others [1,2,3]. The canister not only provides physical protection for the waste, but also prevents contact between the waste and the groundwater. Many bronze relics from the XiZhou Dynasty, China, dated from more than 3,000 years ago, have been preserved perfectly. The study of the corrosion of the bronze relics could contribute to the material selection and design of canister for HLW. IAEA proposed the coordinated research project (CRP) on anthropogenic analogues for geological disposal of high level and long lived radioactive wastes in 1999. This paper reports analysis of corrosion products and preliminary discussion of corrosion mechanism, which is part of research results of IAEA CRP research contract “study on pitting corrosion of unearthed copper relics in different environmental conditions”. *(2*5$3+,&$/6(77,1*6 Baoji is located in the western part of the Guan Zhong Plain of Shaanxi province, where the Qinling Mountains meet the Qian Mountain systems. From time immemorial, Baoji was a hub of communications from Zhong Yuan area to the northwest and southwest. Various national cultures mingled with each other here and Baoji became one of the important birthplaces of the Zhou and Qin civilizations. In the district, ancient cultural relics lie hidden in the earth. The region yields most of the unearthed bronze artifacts of the Zhou and Qin Dynasties in China. It is praised as the Hometown of Bronze Ware. Many bronze products of the Zhou and Qin periods have been excavated [4]. The great quality, exquisite making and
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