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51315-5610-Effects of Anionic Species on the Crevice Corrosion Behavior of Copper in the Groundwater

Picture for Effects of Anionic Species on the Crevice Corrosion Behavior of Copper in the Groundwater
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Product Number: 51315-5610-SG
ISBN: 5610 2015 CP
Author: Qiu Xu
Publication Date: 2015
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As clean and efficient energy nuclear power has been widely used around the world but the high-level radioactive (HLW) has become a major risk. The planned concept of Chinas HLW disposal program is deep underground disposal. The metal container is the first barrier to protect high level radioactive waste against the leakage. At present packaging material selection for geological disposal is different in variety countries because of different geological conditions. Copper as a candidate materials of the container and the corrosion behavior of it had been studied in different environments of geological disposal but few studied in China. In this study the effect of Cl- SO42-and CO32- on the corrosion behavior of copper was examined. The results showed that Cl- and SO42- have positive effect on corrosion in copper and the presence of carbonate ion has negative effect. SO42- promoted crevice corrosion and Cl- promoted matrix dissolved of the outside crevice. The corrosion product film of the inside crevice connected with crevice corrosion.
As clean and efficient energy nuclear power has been widely used around the world but the high-level radioactive (HLW) has become a major risk. The planned concept of Chinas HLW disposal program is deep underground disposal. The metal container is the first barrier to protect high level radioactive waste against the leakage. At present packaging material selection for geological disposal is different in variety countries because of different geological conditions. Copper as a candidate materials of the container and the corrosion behavior of it had been studied in different environments of geological disposal but few studied in China. In this study the effect of Cl- SO42-and CO32- on the corrosion behavior of copper was examined. The results showed that Cl- and SO42- have positive effect on corrosion in copper and the presence of carbonate ion has negative effect. SO42- promoted crevice corrosion and Cl- promoted matrix dissolved of the outside crevice. The corrosion product film of the inside crevice connected with crevice corrosion.
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