Different states of existence of hydrogen in steels
Hydrogen analysis in steels

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Different states of existence of hydrogen in steels


Hydrogen analysis in steels

Author : Jean‐Charles BOSSON

Publication date: April 10, 1993 | Lire en français

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1. Different states of existence of hydrogen in steels

As mentioned above, hydrogen exists in many forms. We can distinguish :

  • hydrogen in proton form (H_)

    According to Friedel [1] , monoatomic hydrogen donates its electron to the metal's 3d conducting layer; this is known as a screened proton in an interstitial position in the lattice, and this form is mobile (interstitial diffusion);

  • hydrogen in molecular form (H 2 )

    When a defect (crack, cavity, pore...) has sufficient volume,...

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