Proceedings of the 5th International Conference on Metals & Hydrogen O134

Proceedings of the 5th International Conference on Metals & Hydrogen O134

Estimation of the rate-limiting step for the hydrogen entry on pipeline steels across their oxide layer

Akash AKASH (*) * (1)1(2)2 , Frantz MARTIN (3)3 , Christine BLANC (3)3 , Manjunath NAIK (2)2 , Alixe DREANO (2)2 , Frédéric CHRISTIEN (2)2

  • (1) 1

    Université Paris Saclay, CEA, Service de recherche en Corrosion et Comportement des Matériaux, 91191, Gif sur Yvette, France

  • (2) 2

    Mines Saint-Etienne, CNRS, UMR 5307 LGF, Centre SMS, F - 42023 Saint-Etienne, France

  • (3) 3

    CIRIMAT, Université de Toulouse, Toulouse INP, CNRS, 4 allée Émile Monso, CS 44362, Toulouse cedex 04, France

  • (*) *

    (corresponding author)
    akash.akash@cea.fr

Abstract

Cr-Mo steel, used in gas pipelines, is considered for hydrogen transport but may suffer from hydrogen embrittlement (HE). Oxide layers can limit hydrogen entry, reducing HE risk. This study explores hydrogen interaction through native and thermally-grown oxides using deuterium tracers. Oxide structure and composition were analysed by SEM-EDS, XPS, and Raman; deuterium uptake by SIMS and TDS. The results help to identify hydrogen diffusion and trapping behaviour, revealing rate-limiting steps of ingress.

Keywords

  • Pipeline Steel
  • Oxide layer
  • Hydrogen
  • Barrier effect
  • Rate limiting step
  • Oxide Degradation

Introduction


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