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Characterization of native oxide and passive film on austenite/ferrite phases of duplex stainless steel using synchrotron haxpeem

Långberg, M. ; Örnek, C. ; Zhang, F. ; Cheng, J. ; Liu, M. ; Grånäs, E. LU ; Wiemann, C. ; Gloskovskii, A. ; Matveyev, Y. and Kulkarni, S. , et al. (2019) In Journal of the Electrochemical Society 166(11). p.3336-3340
Abstract

A new measurement protocol was used for microscopic chemical analysis of surface oxide films with lateral resolution of 1 μm. The native air-formed oxide and an anodic passive film on austenite and ferrite phases of a 25Cr-7Ni super duplex stainless steel were investigated using synchrotron hard X-ray photoemission electron microscopy (HAXPEEM). Pre-deposited Pt-markers, in combination with electron backscattering diffraction mapping (EBSD), allowed analysis of the native oxide on individual grains of the two phases and the passive film formed on the same area after electrochemical polarization of the sample. The results showed a certain difference in the composition of the surface films between the two phases. For the grains with (001)... (More)

A new measurement protocol was used for microscopic chemical analysis of surface oxide films with lateral resolution of 1 μm. The native air-formed oxide and an anodic passive film on austenite and ferrite phases of a 25Cr-7Ni super duplex stainless steel were investigated using synchrotron hard X-ray photoemission electron microscopy (HAXPEEM). Pre-deposited Pt-markers, in combination with electron backscattering diffraction mapping (EBSD), allowed analysis of the native oxide on individual grains of the two phases and the passive film formed on the same area after electrochemical polarization of the sample. The results showed a certain difference in the composition of the surface films between the two phases. For the grains with (001) crystallographic face // sample surface, the native oxide film on the ferrite contained more Cr oxide than the austenite. Anodic polarization up to 1000 mV/Ag/AgCl in 1M NaCl solution at room temperature resulted in a growth of the Cr- and Fe-oxides, diminish of Cr-hydroxide, and an increased proportion of Fe3+ species.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Electrochemical Society
volume
166
issue
11
pages
3336 - 3340
publisher
Electrochemical Society
external identifiers
  • scopus:85073465146
ISSN
0013-4651
DOI
10.1149/2.0421911jes
language
English
LU publication?
yes
id
da2f9d17-3932-4522-8ab5-599a04968be9
date added to LUP
2019-10-29 13:51:46
date last changed
2023-11-19 18:01:35
@article{da2f9d17-3932-4522-8ab5-599a04968be9,
  abstract     = {{<p>A new measurement protocol was used for microscopic chemical analysis of surface oxide films with lateral resolution of 1 μm. The native air-formed oxide and an anodic passive film on austenite and ferrite phases of a 25Cr-7Ni super duplex stainless steel were investigated using synchrotron hard X-ray photoemission electron microscopy (HAXPEEM). Pre-deposited Pt-markers, in combination with electron backscattering diffraction mapping (EBSD), allowed analysis of the native oxide on individual grains of the two phases and the passive film formed on the same area after electrochemical polarization of the sample. The results showed a certain difference in the composition of the surface films between the two phases. For the grains with (001) crystallographic face // sample surface, the native oxide film on the ferrite contained more Cr oxide than the austenite. Anodic polarization up to 1000 mV/<sub>Ag/AgCl</sub> in 1M NaCl solution at room temperature resulted in a growth of the Cr- and Fe-oxides, diminish of Cr-hydroxide, and an increased proportion of Fe<sup>3+</sup> species.</p>}},
  author       = {{Långberg, M. and Örnek, C. and Zhang, F. and Cheng, J. and Liu, M. and Grånäs, E. and Wiemann, C. and Gloskovskii, A. and Matveyev, Y. and Kulkarni, S. and Noei, H. and Keller, T. F. and Lindell, D. and Kivisäkk, U. and Lundgren, E. and Stierle, A. and Pan, J.}},
  issn         = {{0013-4651}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{3336--3340}},
  publisher    = {{Electrochemical Society}},
  series       = {{Journal of the Electrochemical Society}},
  title        = {{Characterization of native oxide and passive film on austenite/ferrite phases of duplex stainless steel using synchrotron haxpeem}},
  url          = {{http://dx.doi.org/10.1149/2.0421911jes}},
  doi          = {{10.1149/2.0421911jes}},
  volume       = {{166}},
  year         = {{2019}},
}