Hydrogen permeation through an Al-0.2 at% Mg alloy

Akito Takasaki, Yoshio Furuya, Takao Kino

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The diffusion of hydrogen in an Al-0.2 at% Mg alloy at temperatures between 625 K and 773 K has been measured by a gas permeation technique, in which the permeation run for the sample was repeated for many times at high temperatures. Because Mg trapped hydrogen, the permeation rate for the Al-0.2 at% Mg alloy was lowered than that for an pure Al for early permeation runs. After heavily repeated runs, however, Mg was transported to the sample surface at the hydrogen reservoir side and was no loner present in the alloy except on the surface, and the permeation rate abruptly increased. The state of Mg on the surface could be a ternary oxide which consists of Mg, Al and O. The diffusivity of the Al-0.2 at% Mg after heavily repeated permeation runs were also determined and the activation energy of hydrogen diffusion was estimated to be 0.25 eV.

Original languageEnglish
Pages (from-to)II/-
JournalMaterials Science Forum
Volume331
Publication statusPublished - 2000 Jan 1
EventThe 7th International Conference ICCA7 - 'Aluminium Alloys: 'Their Physical and Mechanical Properties' - Charlottesville, VA, USA
Duration: 2000 Apr 92000 Apr 14

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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