Second‐harmonic generation technique for in situ study of passive film formation on carbon steel surfaces in aqueous solutions
نویسندگان
چکیده
The aim of this work was to revisit second-harmonic generation (SHG) as a technique for the in situ analysis oxide film formation on steel samples immersed aqueous solutions and during electrochemical experiments. measurements were compared active reflectance spectroscopy (ARS), which is more established technique. Carbon electrodes subjected polarization pH neutral mild-alkaline electrolytes provoke passive films. In SHG allowed monitoring compositional changes formed film, intensity increased domain stability Fe3O4 decreased Fe2O3 potentiodynamic polarization. ARS, other hand, suitable monitor thickness. ARS absorption along with growth when moving anodic direction During 30 min cathodic at −0.9 VAg/AgCl sat. KCl initially combination revealed presence an that primarily composed thickness up 0.7 nm.
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ژورنال
عنوان ژورنال: Materials and Corrosion-werkstoffe Und Korrosion
سال: 2022
ISSN: ['0947-5117', '0043-2822', '1521-4176']
DOI: https://doi.org/10.1002/maco.202213464