Alloying effects on the hydriding properties of vanadium at low hydrogen pressures

The alloying effects on the hydrogen absorption properties of vanadium at low hydrogen pressures have been investigated systematically with various binary V–3 mol% M alloys where M is a 3d transition metal. The PCT curves were measured using an electrochemical method devised newly for this investigation. It was found that the hydriding properties of vanadium at low hydrogen pressures are affected largely by the presence of a small amount of alloying elements, M. For example, the equilibrium hydrogen pressure at low pressures changes monotonously following the order of elements, M, in the periodic table. This change at low hydrogen pressures is different from that at high hydrogen pressures.