Dégazage et hydrogénation

Nouvelle approche de la fragilisation par l’hydrogène – Dégazage et hydrogénation

Auteur(s) : Alexandre FLEURENTIN

Date de publication : 10 déc. 2019

Le problème de la fragilisation par l’hydrogène
demeure actuel malgré la mise en place de normes et de spécifications
pour éviter les ruptures différées. Pour y remédier, on effectue des
traitements de dégazage, après les traitements de surface par voie
chimique ou électrolytique, dont la durée minimum de « dégazage » est
uniquement fixée en fonction de la résistance mécanique à la rupture de
l’acier.  Si des problèmes persistent, cela veut probablement dire qu’il
existe des parts d’ombre dans la compréhension des mécanismes de
désensibilisation à la fragilisation. Cet article permettra de
développer une nouvelle approche de l’interprétation de l’effet
bénéfique du traitement de « dégazage ». Aller sur le site

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