A study was made of the permeation of D through 3N-purity Co foils. The data were described by:

D (cm2/s) = 8.3 x 10-3 exp[-11.8(kcal/mol)/RT]

for α-Co, and by:

D (cm2/s) = 3.4 x 10-2 exp[-13.8(kcal/mol)/RT]

for ε-Co.

The straight lines fit the diffusion parameters

Hydrogen Diffusion in Cobalt. G.R.Caskey, R.G.Derrick, M.R.Louthan: Scripta Metallurgica, 1974, 8[5], 481-6

 

Table 12

Diffusivity of H in Co

 

Temperature (K)

D (m2/s)

278.4

3.382 x 10-12

287.1

6.613 x 10-12

290.2

5.457 x 10-12

293.8

9.281 x 10-12

294.7

1.075 x 10-11

317.5

1.239 x 10-11

317.6

1.289 x 10-11

319.4

8.136 x 10-12

324.2

1.910 x 10-11

332.2

1.816 x 10-11