An investigation was made of room-temperature H release, into vacuum, from electrolytic deposits which had been prepared under various conditions. Diffusivities (table 31) were deduced from the H desorption curves. The total amounts of mobile H which were given off at room temperature, and the total H which was given off at 800C under vacuum, were also determined. The results indicated that the H diffusivity, as well as the amounts of mobile and total H in electrolytic Fe, were strongly dependent upon the electrolysis conditions.

J.N.Petrov, E.A.Mamontov, V.V.Karyakin: Fiziko-Khimicheskaya Mekhanika Materialov, 1967, 3[3], 362-4

 

Table 34

Diffusivity of H in Fe

 

Temperature (K)

Annealing Time at 80C (h)

D (m2/s)

7

11

1.569 x 10-11

7

144

1.800 x 10-10

20

11

4.940 x 10-11

20

144

2.558 x 10-10

25

11

6.333 x 10-11

25

144

4.378 x 10-10

35

11

1.160 x 10-10

35

144

6.000 x 10-10

42

11

1.750 x 10-10

42

144

1.035 x 10-9