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Report No.
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Corrosion of austenitic steel in leakage lithium

Furukawa, Tomohiro; Hirakawa, Yasushi ; Kato, Shoichi

Lithium, which is used as the neutron source of the IFMIF, reacts with oxygen, nitrogen and moisture in atmosphere in case of the leakage accident. In this study, fundamental corrosion test was performed in order to obtain the corrosion behavior of austenitic stainless steel in the estimated lithium compounds. In the experiment, the lithium compounds were filled with the steel into the Tammann pipe made from Al$$_{2}$$O$$_{2}$$, and heated up to 850$$^{circ}$$C. After the test, the specimen was cleaned by alcohol, and then the weight loss measurement and metallurgical examination were performed. Intense corrosion was observed at the environmental conditions containing lithium peroxide. No corrosion was observed in Li$$_{2}$$O environment. According to the consideration based on thermodynamics, Li$$_{2}$$O cannot oxidize iron and lithium is reducing agent. Slight corrosion was observed in LiOH and Li$$_{3}$$N environments.

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Category:Nuclear Science & Technology

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