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500$$^{circ}$$Cの溶融鉛ビスマス中におけるT91およびSUS316Lの腐食試験

Corrosion test of T91 and SUS316L in liquid lead bismuth at 500$$^{circ}$$C

小松 篤史 ; 加藤 千明   

Komatsu, Atsushi; Kato, Chiaki

酸素濃度約10$$^{-7}$$, 10$$^{-5}$$wt%の溶融鉛ビスマス共晶合金中で腐食試験を行った。SUS316Lは、平均腐食量は小さいが、酸素濃度が低下すると局部腐食が激しくなった。T91は、平均腐食量はSUS316Lに比べて大きいが、局部腐食を起こした形跡はなく、酸素濃度が増加するにつれて若干腐食量が増加した。

A corrosion test was conducted in a molten lead-bismuth eutectic alloy having an oxygen concentration of about 10$$^{-7}$$ and 10$$^{-5}$$wt%. Although the average amount of corrosion of SUS316L was small, localized corrosion became severe when the oxygen concentration decreased. The average amount of corrosion of T91 was larger than that of SUS316L and the amount of corrosion increased slightly as the oxygen concentration increased, but localized corrosion was not severe.

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