Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Passive Films Formed on Fe and Ni Based Alloys in an Alkaline Medium: An Insight into Complementarities between Electrochemical Techniques and Near-Field Microscopies (AFM/SKPFM)

Noureddine Benaioun
,
Nasreddine Moulayat
ORCID logo ,
Noureddine Hakiki
,
Hanene Ramdane
,
Emmanuel Denys
,
Alban Florentin
,
Kouider Driss Khodja
,
Mohamed Heireche
,
Jean Luc Bubendorff
*
Version 1 : Received: 26 September 2023 / Approved: 26 September 2023 / Online: 28 September 2023 (04:57:58 CEST)

A peer-reviewed article of this Preprint also exists.

Benaioun, N.E.; Moulayat, N.; Hakiki, N.E.; Ramdane, H.; Denys, E.; Florentin, A.; Khodja, K.D.; Heireche, M.M.; Bubendorff, J.L. Passive Films Formed on Fe- and Ni-Based Alloys in an Alkaline Medium: An Insight into Complementarities between Electrochemical Techniques and Near-Field Microscopies (AFM/SKPFM). Appl. Sci. 2023, 13, 11659. Benaioun, N.E.; Moulayat, N.; Hakiki, N.E.; Ramdane, H.; Denys, E.; Florentin, A.; Khodja, K.D.; Heireche, M.M.; Bubendorff, J.L. Passive Films Formed on Fe- and Ni-Based Alloys in an Alkaline Medium: An Insight into Complementarities between Electrochemical Techniques and Near-Field Microscopies (AFM/SKPFM). Appl. Sci. 2023, 13, 11659.

Abstract

This study presents a combined electrochemical impedance spectroscopy (EIS) and atomic force microscopy (AFM) and Scanning Kelvin Probe Force Microscopy(SKPFM) investigation on the natural passivation process of stainless steels (AISI 316 and AISI 304) and nickel-based alloy (INCONEL 600) as a function of immersion time in an alkaline medium (pH = 13). EIS measurements show an increase in the resistance of the film with increasing immersion time in the electrolyte. After 3 days of immersion, for the three alloys, the films formed constitute an effective barrier to the dissolution of the alloys as shown by AFM and SKPFM. The oxide film growth on each substrates is only influenced by trenches formed during the polishing step and don’t depend on the chemical composition.

Keywords

Stainless steel; nickel-based alloy; Cyclic voltammetry; Electrochemical impedance spectroscopy; Atomic force microscopy; SKPFM

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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