Electromigration and diffusion of hydrogen in iron, depending on unit elongation, were investigated. The resistivity method was applied in the investigations. It was found that the obtained experimental results cannot be described by means of a single flux of hydrogen, which diffuses in the electric field. In order to explain the obtained results, the existence of two fluxes of hydrogen in the stretched metal was assumed: migration, according to the interstitial mechanism, and migration according to the interstitial-defective mechanism. The dependence of effective valences and diffusion coefficients for both mechanisms were determined.

The Influence of External Uniaxial Stretching on the Electromigration and Diffusion of Hydrogen in Iron. R.Pietrzak, D.Frączek, R.Szatanik: Journal of Physics and Chemistry of Solids, 2009, 70[3-4], 588-94