Effect of oxidation treatment and surface filming on hydrogen degassing from TiH2

An experiment was carried out to determine the effects of oxidation treatme nt and surface filming on hydrogen degassing from TiH2 during heating and a t fixed temperatures. It was found that surface filming has a stronger effe ct than oxidation, through which the temperature corresponding to the degas sing peak of TiH2 moved from 638 degrees C to more than 680 degrees C and t he degassing temperature range increased from 125 degrees C to 150 degrees C in the heating process. From the degassing measurements at fixed temperat ures and the physics model, the diffusion coefficients of hydrogen were det ermined to be 0.3 to 3.0 times less than that of the original TiH2.