Advanced ORIENT cycle study (Phase I), 5; Metal corrosion evaluation in hydrochloric acid media

Koyama, Shinichi  ; Ozawa, Masaki; Kurosawa, Kiyoko*; Hanamoto, Yukio*; Tatenuma, Katsuyoshi*

Corrosion experiments (Immersion, exposure and electro chemistry) in pure HCl and HCl type SHLLW solution at RT and 90C were performed using selected candidate metals, Ta, Zr, Nb and Hastelloy-B. We found the measured corrosion rates were less than 0.05 mm/y for Ta in all experiment, and therefore, Ta showed an all-round anti-corrosion property. Hastelloy-B, Nb and Zr were not acceptable at 90C because of its relatively high corrosion rate (0.1 mm/y).