The hydrides which were formed during cathodic polarization in acid solutions were studied by using the 15N nuclear reaction method. The diffusivity of H in ZrH1.61 at 22C was equal to 1.97 x 10-11cm2/s, and the overall results were described by:

D (cm2/s) = 4.44 x 10-4 exp[-0.37(eV)/kT]

E.Brauer, R.Gruner, F.Rauch: Berichte der Bunsengesellschaft für Physikalische Chemie, 1983, 87[4], 341-5