A study was made of the effect of cold-working upon cathodic H permeability through zone-refined Fe. By using degrees of cold-working which ranged from 6 to 71%, it was shown that the rate of H diffusion decreased with cold work, with the magnitude of the decrease being independent of the degree of prior cold-working of the specimens.

W.Raczynski, S.Talbot-Besnard: Comptes Rendus, 1970, 270[7], 602-5