Abstract

The effects of hydrogen insertion by electrolytic charging in H 2SO 4 solution in pure nickel and palladium were investigated. The hydrogenated phases of Ni and Pd and their stability during aging were determined by X-ray diffraction. The NiH 0,68 hydride and the α-Ni phase were distinguished by scanning electron microscopy (SEM) operating in the backscattered electrons mode. Interesting features about the intergranular cracks developed during and after charging are discussed.

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