Étanchéité à l’hydrogène de revêtements de molybdène. Évolution sous sollicitation mécanique

Evolution under Mechanical Solicitation of Hydrogen - Tightness of Molybdenum Coatings

Laboratoire d’Etudes et Recherches en Mécanique et Énergétique des Surfaces, Nancy (1)

Abstract

Desorption experiments are used to test hydrogen-tightness of molybdenum coatings under mechanical solicitation. The experiment necessitated the construction of a small-sized ultra-vacuum tensile testing machine. The tested molybdenum coatings (nickel substrate of purity less than 99 % and austenitic stainless steel substrate) are hydrogen tight without external mechanical solicitation. There is a gradual and continuous loss of the hydrogen tightness of the deposit when mecanically solicitated.