Effect of Metallographic Factor on Hydrogen Pick-up Properties of Zircaloy-2

概要

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Zirconium alloy sheets were prepared with varying Fe, Cr and Ni systematically. The corrosion and hydrogen pick-up property were estimated in steam at 673 K, in water at 633 K and in super critical water at 673 K. The effect of the SPP and the oxide film on the hydrogen pick-up was studied from the hydrogen pick-up route using D2O and the microstructure of the oxide film and secondary phase particle (SPP) in the oxide film. The hydrogen pick-up ratio decreased with increase of Fe and decrease of Ni. It was affected by Fe/Ni ratio of the matrix. The hydrogen pick-up was not related to SPP but was related to the oxide film when the oxide film was relatively thick. The tetragonal ZrO2 is considered to act as a barrier for hydrogen pick-up.
2006-09-25