Hydrogen concentration profiling

EFFECT OF REMOTE HYDROGEN BOUNDARY CONDITIONS ON THE NEAR CRACK-TIP HYDROGEN CONCENTRATION PROFILES IN A CRACKED PIPELINE FRACTURE TOUGHNESS ASSESSMENT... [Pg.187]

Crack-Tip Hydrogen Concentration Profiles in a Cracked Pipeline ... [Pg.251]

A technique which can yield hydrogen concentration profiles of a glass surface(19) without the complications of ion milling involves using the resonant nuclear reaction between hydrogen 1H) and (1 N). At precisely 6.385 M V (lab) there is a resonance in the reaction 3N + H = X +... [Pg.217]

Figure 5.17. Simulated hydrogen concentration profiles at different values of the Thiele modulus. From [5.61], with permission from the American Chemical Society.

Solution (a) We can apply Pick s first law to calculate the steady-state flux of hydrogen atoms (H) through the Pd membrane based on the steady-state concentration gradient in H that is established across the membrane and the diffusivity of H in Pd. At steady state, the hydrogen concentration profile across the membrane is linear, as shown in Figure 4.3, and thus the gradient is easily calculated from the concenflation difference between the two sides of the membrane and the membrane thickness ... [Pg.92]

Corresponding hydrogen concentration profile through the steel at times h, t2 and ta- Note that applying eqn. (3.2) to the flux obtained at time ti yields an underestimated concentration at the entry face, whereas after t2 the concentration gradient is sufficiently uniform for the equation to apply. [Pg.55]

Figure 4.19 Anode channel and schematic of hydrogen concentration profile.

Figure 7. Hydrogen concentration profiles during charging and discharging (/>/ ) of a bulk specimen under potentiostatic pulse conditions with a constant concentration at the input side. (After Ref. 13. Reprinted with permission from Acta Metall, Copyright 1987, Pergamon Press pic.)...

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