The migration of H was studied at temperatures of between 260 and 1000K by using electrochemical and gas permeation techniques. It was found that the diffusion of H could be described by the expression:

 

D (m2/s) = 9.0 x 10-7 exp[-43.5(kJ/mol)/RT]

Diffusion Coefficients of Hydrogen in Ni-Cu and Ni-Co Alloys. H.Hagi: Transactions of the Japan Institute of Metals, 1986, 27[4], 233-40

 

Table 16

Diffusivity of H in Cu Foils

 

Specimen

Temperature (K)

D (m2/s)

coated

299.0

2.60 x 10-14

coated

307.0

9.11 x 10-14

coated

308.0

3.55 x 10-14

uncoated

299.0

3.76 x 10-14

uncoated

300.5

2.40 x 10-14

uncoated

301.0

5.17 x 10-14

uncoated

306.0

4.41 x 10-14

uncoated

314.0

1.09 x 10-13

uncoated

314.5

9.89 x 10-14

uncoated

322.5

1.56 x 10-13