Numerical Study of Hydrogen Trapping: Application to an API 5L X60 Steel

Table 5

Diffusion parameters for the API 5L X60 AR steel condition from calculated rising transients.

Rising transient
Temperature	𝐷app	𝑖ss		Reference [7]		Δ𝐺^′	𝑁
°C	cm^2/s	A/cm^2	𝜆	𝜌	𝜇	KJ/mol	mol H/cm^3
30	4.27×10^−6	1.28×10^−7	3138	3.36	1000	−48.4	1.45×10^−8
50	7.53×10^−6	3.13×10^−7	2074	15.93	1000	−53.8	4.24×10^−9
70	1.73×10^−5	6.12×10^−7	1393	18.74	1000	−56.9	3.08×10^−9