2. Reminders of FPH mechanisms
Degradation of the mechanical properties of metallic materials in the presence of hydrogen gas begins with a dissociative adsorption phase: before penetrating the metal, the dihydrogen molecule adsorbs and then dissociates on the surface of the sample. Each H then binds chemically to the metal atoms and diffuses into the volume.
2.1 Surface phenomena (dissociative adsorption)
Figure 6 shows the main steps classically presented to describe the penetration of H into metal. Initially (step 1 in figure 6 ), a H 2 molecule will...
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Reminders of FPH mechanisms
Mechanical behavior of metal alloys under H2 pressure
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