Hydrogen-Induced Enhancement of Atomic Diffusion in Metals
Atomic diffusion in metals is invariably enhanced by dissolution of hydrogen, in some cases by many orders of magnitude. This is a consequence of the formation of superabundant vacancies (SAVs), one of the general properties of M-H systems. Some examples of H-induced enhancement of interdiffusion in alloys and a detailed investigation of self-diffusion in Nb hydride, NbHx, are described, together with accelerated atomic migration observed in electrodeposited metals, also a consequence of SAV formation in the electrodeposition process.
Andreas Öchsner, Graeme E. Murch, Ali Shokuhfar and João M.P.Q. Delgado
Y. Fukai "Hydrogen-Induced Enhancement of Atomic Diffusion in Metals", Defect and Diffusion Forum, Vols. 297-301, pp. 132-141, 2010