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Effect of nitric acid concentration on corrosion behavior of 12%Cr, 6%Al oxide dispersion-strengthened steel which is a new cladding material

Ambai, Hiromu ; Takahatake, Yoko  ; Sano, Yuichi  ; Takeuchi, Masayuki ; Koizumi, Kenji ; Yamashita, Shinichiro   ; Sakamoto, Kan*

As part of a study of nuclear fuel reprocessing process, the effect of nitric acid concentration on the corrosion behavior of 12%Cr, 6%Al oxide dispersion-strengthened steel which is developed as a new cladding material was evaluated. The corrosion rate was increased with increasing nitric acid concentration at boiling point. But this material had a good corrosion resistance and active corrosion didn't occur. The corrosion resistance can be attributed to Al as well as Cr. The acceleration of the corrosion rate with increasing nitric acid concentration was caused by the increase of the passive current density.

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