Periodic laser surface texturing limits hydrogen ingress in Fe-Cr alloy

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Anthony Nakhoul, Alixe Dreano, Claire Maurice, Vincent Barnier, Matthieu Lenci, Florence Garrelie, Jean-Philippe Colombier, Frédéric Christien

Published: 01 Jun 2025, Last Modified: 22 Nov 2025Acta MaterialiaEveryoneRevisionsCC BY-SA 4.0
Abstract: Highlights•Permeation is used to evaluate the impact of laser texturing on hydrogen ingress.•Texturing reduces hydrogen subsurface concentration by up to 95% through LIPSS.•The thin duplex oxide layer formed during laser texturing mitigates hydrogen absorption.•The controlled surface roughness limits hydrogen ingress.