Effect of hydrogen on the passivation for ultra-thin 316 L SS foil

The reformation and characterisation of the passive film formed on ultra-thin 316 L after hydrogen charging is investigated by combining EBSD, TMDS, XRD, Synchrotron-based XPS, and electrochemical experiments. The results show that ultra-thin foil reforms a passive film after 12 h of hydrogen releas...

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Veröffentlicht in:	Npj Materials degradation 2023-10, Vol.7 (1), p.79-10, Article 79
Hauptverfasser:	Yue, Xiaoqi, Yang, Zhile, Larsson, Alfred, Tang, Huajie, Appelfeller, Stephan, Sefer, Birhan, Preobrajenski, Alexei, Li, Jun, Zhang, Lei, Pan, Jinshan
Format:	Artikel
Sprache:	eng
Schlagworte:	639/638/161/892 639/638/542/971 Chemical Sciences Chemistry and Materials Science Corrosion Corrosion and Coatings Electrochemistry Foils Grain boundaries Hydrogen Hydrogen charging Hydroxides Inorganic Chemistry Kemi Materials Science Microstructure Natural Sciences Naturvetenskap Oorganisk kemi Point defects Stainless steel Structural Materials Synchrotrons Thickness Tribology
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Zusammenfassung:	The reformation and characterisation of the passive film formed on ultra-thin 316 L after hydrogen charging is investigated by combining EBSD, TMDS, XRD, Synchrotron-based XPS, and electrochemical experiments. The results show that ultra-thin foil reforms a passive film after 12 h of hydrogen release in NaCl solution. The reformed passive film is half the thickness of the as-received passive film and is dominated by Cr oxides/hydroxides. The lattice extension caused by residual hydrogen accelerates Cr migration to form Cr 2 O 3 ; while the diffusible hydrogen occupies the cation vacancies and results in high defect density for the reformed passive film within 12 h.
ISSN:	2397-2106 2397-2106
DOI:	10.1038/s41529-023-00398-7