Cycled hydrogen permeation through Armco iron – A joint experimental and modeling approach

Research output: Contribution to journalArticleResearchpeer-review

External Organisational units

  • voestalpine Stahl Donawitz GmbH
  • Materials Center Leoben Forschungs GmbH
  • Institute of Physics of Materials of the Academy of Sciences of the Czech Republic


Understanding hydrogen embrittlement in steels requires research in hydrogen diffusion and trapping at microstructural defects. The present paper deals with hydrogen permeation and trapping at defects in the base material, Armco iron, eliminating effects coupled with alloying and precipitation. Cycled permeation curves are recorded and evaluated by using sound diffusion models to identify hydrogen trap sites as dislocations, grain boundaries and vacancies and assign their trapping energies. Furthermore, trap densities are evaluated and used together with the trapping energies as parameters in an adapted diffusion equation for hydrogen, interpreting the experiments significantly better than simple use of classical Fick's laws.


Original languageEnglish
Article number109017
Number of pages11
JournalCorrosion science
Issue numberNovember
Publication statusPublished - 23 Sept 2020