Optical spectroscopic and electrochemical characterization of oxide films on a ferritic stainless steel

verfasst von: Changfeng Fan, Jianmin Shi, Azat Sharafeev, Peter Lemmens, Klaus Dilger
Abstract: Colored oxide films that form on ferritic stainless steel in a high-temperature, oxidizing environment and correspond to different chemical compositions can cause a deterioration of pitting resistance and corrosion performance. Herein, optical spectroscopic and electrochemical techniques have been used to reveal the relationship between color, chemical composition, and corrosion resistance of oxide films formed in the temperature range from 400°C to 800°C for 30 min and at 800°C for 10, 20, 30, and 60 min. The substrate with a thin and dense passivation film leads to a low pitting potential but high corrosion resistance. Oxide films of yellowish or brownish color formed below 600°C are mainly iron oxides, which correspond to low corrosion resistance. No passivation characteristics can be observed for polarization curves of oxide films formed at 500°C and 600°C. The color of oxide films varies from blue to dark gray with the increase of oxidation time at 800°C. Corrosion resistance changes with different proportions of Fe₃O₄, Cr₂O₃, and FeCr₂O₄. The gray oxide films formed at 800°C for 30 min exhibit the lowest pitting susceptibility and the highest corrosion resistance.
Externe Organisation(en): Technische Universität Braunschweig
Typ: Artikel
Journal: Materials and corrosion
Band: 71
Seiten: 440-450
Anzahl der Seiten: 11
ISSN: 0947-5117
Publikationsdatum: 03.03.2020
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Umweltchemie, Werkstoffmechanik, Maschinenbau, Oberflächen, Beschichtungen und Folien, Metalle und Legierungen, Werkstoffchemie
Elektronische Version(en): https://doi.org/10.1002/maco.201911425 (Zugang: Offen)

BibTeX

@article{a03364fcfe854dfba4eeb909eadc20fb,
title = "Optical spectroscopic and electrochemical characterization of oxide films on a ferritic stainless steel",
abstract = "Colored oxide films that form on ferritic stainless steel in a high-temperature, oxidizing environment and correspond to different chemical compositions can cause a deterioration of pitting resistance and corrosion performance. Herein, optical spectroscopic and electrochemical techniques have been used to reveal the relationship between color, chemical composition, and corrosion resistance of oxide films formed in the temperature range from 400°C to 800°C for 30 min and at 800°C for 10, 20, 30, and 60 min. The substrate with a thin and dense passivation film leads to a low pitting potential but high corrosion resistance. Oxide films of yellowish or brownish color formed below 600°C are mainly iron oxides, which correspond to low corrosion resistance. No passivation characteristics can be observed for polarization curves of oxide films formed at 500°C and 600°C. The color of oxide films varies from blue to dark gray with the increase of oxidation time at 800°C. Corrosion resistance changes with different proportions of Fe3O4, Cr2O3, and FeCr2O4. The gray oxide films formed at 800°C for 30 min exhibit the lowest pitting susceptibility and the highest corrosion resistance.",
keywords = "corrosion resistance, electrochemical measurements, ferritic stainless steel, optical spectroscopy, oxide films",
author = "Changfeng Fan and Jianmin Shi and Azat Sharafeev and Peter Lemmens and Klaus Dilger",
note = "Funding information: J. S. acknowledges financial support from the German Research Foundation (DFG, SH802/2?1). C. F. thanks the China Scholarship Council for a Ph.D. Fellowship (No. 201506450019). P. L. thanks the support of the German Research Foundation (DFG?RTG 1952/1, DFG?EXC 2123, DFG?LE967/16?1) and the NTH?School “Contacts in Nanosystems.” J. S. acknowledges financial support from the German Research Foundation (DFG, SH802/2-1). C. F. thanks the China Scholarship Council for a Ph.D. Fellowship (No. 201506450019). P. L. thanks the?support of the German Research Foundation (DFG-RTG 1952/1, DFG-EXC 2123, DFG-LE967/16-1) and the NTH-School ?Contacts in Nanosystems.?",
year = "2020",
month = mar,
day = "3",
doi = "10.1002/maco.201911425",
language = "English",
volume = "71",
pages = "440--450",
journal = "Materials and corrosion",
issn = "0947-5117",
publisher = "John Wiley and Sons Ltd",
number = "3",
}