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Report No.
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Comparison of the corrosion behavior of austenitic and ferritic/martensitic steels exposed to static liquid Pb-Bi at 450 and 550 $$^{circ}$$C

Kurata, Yuji; Futakawa, Masatoshi  ; Saito, Shigeru   

In order to study effects of temperature and alloying elements on corrosion behavior in liquid Pb-Bi which will be used for an accelerator driven system (ADS), corrosion tests of various steels were conducted under static liquid Pb-Bi condition. The tests were performed in oxygen-saturated liquid Pb-Bi at 450$$^{circ}$$C and 550$$^{circ}$$C for 3000h. Oxide films were formed during corrosion at 450$$^{circ}$$C and 550$$^{circ}$$C. Corrosion depth of steels decreased at 450$$^{circ}$$C with increasing Cr content of steels. Austenitic stainless steels containing Ni didn't exhibit appreciable dissolution of Ni and Cr at 450$$^{circ}$$C. The thick ferrite layer produced by dissolution of Ni and Cr was found in JPCA and type 316ss at 550$$^{circ}$$C. For this reason the corrosion depth of austenitic stainless steels, JPCA and type 316ss became large. A Si-added austenitic stainless steel showed good corrosion resistance at 550$$^{circ}$$C because a protective oxide film formed on the steel prevented dissolution of Ni and Cr into liquid Pb-Bi.

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Category:Materials Science, Multidisciplinary

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