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In-situ synchrotron GIXRD study of passive film evolution on duplex stainless steel in corrosive environment
KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0002-3029-6493
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. KTH Royal Institute of Technology, Sweden.
Lund University, Sweden.
Lund University, Sweden.
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2018 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 141, p. 18-21Article in journal (Refereed) Published
Abstract [en]

This paper presents new findings about the passive film formed on super duplex stainless steel in ambient air and corrosive environments, studied by synchrotron grazing-incidence X-ray diffraction (GIXRD). The passive film, formed in air, was seen to be a nano-crystalline mixed-oxide. Electrochemical polarisation to the passive region in aqueous 1 M NaCl at room temperature resulted in an increase of the passive film thickness, preferential dissolution of Fe, and partial loss of crystallinity. After termination of polarization to the transpassive regime, reformation of the mixed-oxides was observed, showing a thicker, semi-crystalline, and more defective nature (more vacancies) with further new oxides/hydroxides.

Place, publisher, year, edition, pages
2018. Vol. 141, p. 18-21
Keywords [en]
De-alloying, Duplex stainless steel, Grazing-incidence X-ray diffraction (GIXRD), Oxide film, Passivity, Selective dissolution, Crystalline materials, Dealloying, Dissolution, Oxide films, Polarization, Sodium chloride, Steel corrosion, X ray diffraction, Corrosive environment, Electrochemical polarisation, Grazing-incidence X-ray diffraction, Preferential dissolution, Super duplex stainless steel, Stainless steel
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-34501DOI: 10.1016/j.corsci.2018.06.040Scopus ID: 2-s2.0-85049421217OAI: oai:DiVA.org:ri-34501DiVA, id: diva2:1237619
Note

 Funding details: 2015-04490, VR, Vetenskapsrådet;

Funding details: 2015-06092, VR, Vetenskapsrådet;

Available from: 2018-08-09 Created: 2018-08-09 Last updated: 2019-06-17Bibliographically approved

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