The behavior of H atoms was investigated by using a resistivity method at temperatures ranging from 293 to 773K. It was found that the diffusivity could be described by:

D (m2/s) = 5.3 x 10-10 exp[-0.8(eV)/kT]

while the electrical mobility was described by:

D (m2/Vs) = 1.24 x 10-8 exp[-0.9(eV)/kT]

The H atoms migrated towards the cathode, and the effective valence increased with temperature according to:

Zeff (Ωm) = 1.42 - (5.0 x 10-8)/R,

where R was the specific electrical resistance.

The Electromigration and Diffusion of Hydrogen in Molybdenum. R.Pietrzak, B.Rozenfeld: Journal of the Less-Common Metals, 1990, 162[1], 23-31