Electrorefining of CuZr Alloy Using Ba2ZrF8-LiF Electrolyte

서지정보

ㆍ발행기관 : 한국재료학회 ㆍ수록지정보 : 한국재료학회지 / 27권 / 12호
ㆍ저자명 : Seong Hun Lee, Jeong Hun Choi, Bung Uk Yoo, Jong Hyeon Lee

목차

1. Introduction
2. Experimental
2.1 Materials and equipment
2.2 Determination of salt melting points
2.3 Cyclic voltammetry test
2.4 Polarization behavior and electrorefining experiment
3. Results and Discussion
3.1 Salt melting points
3.2 Electrochemical properties of the electrolyte
4. Conclusions
Acknowledgemnet
References

영어 초록

In the production of zirconium cladding tube, a pickling acid solution is used to remove surface contaminants, which generates tons of pickling acid waste. The waste pickling solution is a valuable resource of Hf-free Zr. Many studies have investigated separating the Hf-free Zr source from the waste pickling acid. The results showed that Ba2ZrF8 precipitates prepared from the waste pickling acid were useful as an electrolyte for the electrorefining of Zr in molten salt. In the present work, electrorefining was performed in a Ba2ZrF8-LiF binary electrolyte to recover Zr from a Hf-free CuZr ingot anode prepared by electroreduction. Before electrorefining, two pretreatments are performed. First, electrolyte melting was carried out to determine the eutectic temperature, and second, the electrolyte was treated to eliminate impurities, mainly hydride. After electrorefining, the cathode deposits were analyzed by O2 gas analyzer and SEM-EDX to explore the possibility of recovering nuclear-grade Zr metal. Moreover, the anode was analyzed by SEM-EDX to determine the Zr dissolution depth.

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