Hydrogen diffusivity, uptake and embrittlement of solution annealed and cold deformed austenitic stainless steel 1.4435 at hydrogen pressures up to 1000 bar and 200 °C

Matthias Eichinger, Johann Pengg, Dino Zwittnig, Gregor Karl Mori

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Austenitic stainless steel 1.4435, a candidate material for high-pressure tubing for hydrogen applications, was investigated in two different stages of cold deformation (0 and 27 %) regarding its hydrogen embrittlement tendency. The determination of effective diffusion coefficients revealed slightly increased diffusion kinetics at 60°C for the cold-reduced material (8.0 · 10−15 m²/s) compared to the solution annealed one (5.0 · 10−15 m²/s). High-pressure gaseous hydrogen charging shows no differences regarding the degree of cold deformation with a maximum hydrogen concentration of 112 wt.-ppm. Furthermore, a significant ductility loss expressed by the ratio of the reduction of area was observed.
Original languageEnglish
Article number112219
Number of pages16
JournalCorrosion science
Volume235.2024
Issue number15 July
DOIs
Publication statusE-pub ahead of print - 17 Jun 2024

Bibliographical note

Publisher Copyright: © 2024 The Author(s)

Keywords

  • austenitic stainless steel
  • high-pressure charging
  • hydrogen embrittlement
  • Hydrogen uptake

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