The diffusion of H in pure Fe which was in contact with distilled water at temperatures ranging from 10 to 100C was investigated by means using mass spectrometry. It was found that the results could be described by:

D (cm2/s) = 2.23 x 10-3 exp[-3.1(kcal/mol)/RT]

J.Y.Choi: Fall Meeting, Metallurgical Society of AIME, October 1968

 

Table 32

Diffusivity of H in Fe at 20C as a Function of Tensile Deformation

 

Deformation (%)

D (cm2/s)

Densitytrap(/cm3)

DensityDislocation(/cm2)

5

7.5 x 10-5

8.0 x 1017

2.7 x 109

10

6.9 x 10-5

1.7 x 1018

5.4 x 109

15

6.2 x 10-5

2.8 x 1018

8.1 x 109

20

5.6 x 10-5

4.2 x 1018

1.06 x 1010