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Edvin Lundgren. Portrait.

Edvin Lundgren

Professor

Edvin Lundgren. Portrait.

In-situ synchrotron GIXRD study of passive film evolution on duplex stainless steel in corrosive environment

Author

  • Cem Örnek
  • Marie Långberg
  • Jonas Evertsson
  • Gary Harlow
  • Weronica Linpé
  • Lisa Rullik
  • Francesco Carlà
  • Roberto Felici
  • Eleonora Bettini
  • Ulf Kivisäkk
  • Edvin Lundgren
  • Jinshan Pan
Show all

Summary, in English

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.

Department/s

  • Synchrotron Radiation Research

Publishing year

2018-08-15

Language

English

Pages

18-21

Publication/Series

Corrosion Science

Volume

141

Document type

Journal article

Publisher

Elsevier

Topic

  • Manufacturing, Surface and Joining Technology

Keywords

  • De-alloying
  • Duplex stainless steel
  • Grazing-incidence X-ray diffraction (GIXRD)
  • Oxide film
  • Passivity
  • Selective dissolution

Status

Published

ISBN/ISSN/Other

  • ISSN: 0010-938X