An electrochemical technique was used to study H diffusion through Armco Fe membranes. It was found that the data for temperatures of 10 to 40C were governed by an activation energy of 8.62kcal/mol, while the data for temperatures of 40 to 90C were governed by an activation energy of 4.49kcal/mol.

A.K.Mindyuk, E.I.Svist: Fiziko-Khimicheskaya Mekhanika Materialov, 1973, 9[1], 36-41