An unsteady-state gas-liquid metal diffusion cell technique was used to determine the rates of absorption of H in stagnant liquid Fe and in several binary alloys. The rates were found to be controlled by the diffusion of H in the liquid phase, thus permitting the Arrhenius parameters to be calculated (table 46).

P.J.Depuydt, N.A.D.Parlee: Metallurgical Transactions, 1992, 3[2], 525-32

 

 

 

Table 46

Diffusion of H in Liquid Fe Alloys

 

Addition

C (at%)

Temperature (C)

Do (cm2/s)

E (kcal/mol)

-

0

1550-1680

4.37 x 10-3

4.134

Ni

5

1575-1650

4.66 x 10-3

4.509

Co

5

1575-1650

4.76 x 10-3

4.382

Cu

5

1575-1650

3.22 x 10-3

3.019

V

5

1575-1650

2.70 x 10-3

2.860

Cr

5

1575-1650

3.56 x 10-3

3.496

Nb

5

1575-1650

2.00 x 10-3

2.880

Mo

5

1575-1600

2.55 x 10-3

2.805

W

5

1575-1600

2.93 x 10-3

3.458