Influence of Surface Strain on Passive Film Formation of Duplex Stainless Steel and Its Degradation in Corrosive Environment
(2019) In Journal of the Electrochemical Society 166(11). p.3071-3080- Abstract
- The effect of surface strain on the passive film evolution of SAF 2507 super duplex stainless steel exposed to ambient air and 0.1 M NaCl solution with varying anodic polarization at room temperature has been investigated using in-situ grazing incidence X-ray diffraction (GIXRD) in combination with electrochemical measurements. Surface strain affected the crystallinity of the passive film as such that the surface oxides/hydroxides were predominantly amorphous, with some minor crystalline CrOOH and FeOOH present in the film. Crystalline CrOOH was seen to diminish in volume upon immersion in the NaCl solution, well-possibly becoming amorphous during anodic polarization, whereas crystalline FeOOH was seen to increase in volume during... (More)
- The effect of surface strain on the passive film evolution of SAF 2507 super duplex stainless steel exposed to ambient air and 0.1 M NaCl solution with varying anodic polarization at room temperature has been investigated using in-situ grazing incidence X-ray diffraction (GIXRD) in combination with electrochemical measurements. Surface strain affected the crystallinity of the passive film as such that the surface oxides/hydroxides were predominantly amorphous, with some minor crystalline CrOOH and FeOOH present in the film. Crystalline CrOOH was seen to diminish in volume upon immersion in the NaCl solution, well-possibly becoming amorphous during anodic polarization, whereas crystalline FeOOH was seen to increase in volume during polarization to the passive potential regime. Strain relaxation, associated with metal dissolution, occurred in both austenitic and ferritic grains during immersion in the electrolyte. Anodic polarization to the transpassive regime led to maximum strain relaxation, occurring more on the austenite than the ferrite. The selective transpassive dissolution nature of the ferrite was significantly reduced due to large strains in the austenite. Passive film breakdown was reflected by enhanced dissolution of Fe, Cr, Mo and Ni occurring simultaneously around 1300 mV vs. Ag/AgCl. (Less)
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- author
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Corrosion, duplex stainless steel, grazin-incidence x-ray diffraction (GIXRD), Passivity, Surface Science, Transpassive breakdown
- in
- Journal of the Electrochemical Society
- volume
- 166
- issue
- 11
- pages
- 3071 - 3080
- publisher
- Electrochemical Society
- external identifiers
-
- scopus:85073425633
- ISSN
- 0013-4651
- DOI
- 10.1149/2.0101911jes
- language
- English
- LU publication?
- yes
- id
- 376e203b-b584-4ea1-b30b-c1a150fac20f
- date added to LUP
- 2019-05-08 15:00:12
- date last changed
- 2023-12-03 08:01:35
@article{376e203b-b584-4ea1-b30b-c1a150fac20f, abstract = {{The effect of surface strain on the passive film evolution of SAF 2507 super duplex stainless steel exposed to ambient air and 0.1 M NaCl solution with varying anodic polarization at room temperature has been investigated using in-situ grazing incidence X-ray diffraction (GIXRD) in combination with electrochemical measurements. Surface strain affected the crystallinity of the passive film as such that the surface oxides/hydroxides were predominantly amorphous, with some minor crystalline CrOOH and FeOOH present in the film. Crystalline CrOOH was seen to diminish in volume upon immersion in the NaCl solution, well-possibly becoming amorphous during anodic polarization, whereas crystalline FeOOH was seen to increase in volume during polarization to the passive potential regime. Strain relaxation, associated with metal dissolution, occurred in both austenitic and ferritic grains during immersion in the electrolyte. Anodic polarization to the transpassive regime led to maximum strain relaxation, occurring more on the austenite than the ferrite. The selective transpassive dissolution nature of the ferrite was significantly reduced due to large strains in the austenite. Passive film breakdown was reflected by enhanced dissolution of Fe, Cr, Mo and Ni occurring simultaneously around 1300 mV vs. Ag/AgCl.}}, author = {{Örnek, Cem and Långberg, Marie and Evertsson, Jonas and Harlow, Gary and Linpé, Weronica and Rullik, Lisa and Carlà, Francesco and Felici, Roberto and Kivisäkk, Ulf and Lundgren, Edvin and Pan, Jinshan}}, issn = {{0013-4651}}, keywords = {{Corrosion; duplex stainless steel; grazin-incidence x-ray diffraction (GIXRD); Passivity; Surface Science; Transpassive breakdown}}, language = {{eng}}, number = {{11}}, pages = {{3071--3080}}, publisher = {{Electrochemical Society}}, series = {{Journal of the Electrochemical Society}}, title = {{Influence of Surface Strain on Passive Film Formation of Duplex Stainless Steel and Its Degradation in Corrosive Environment}}, url = {{http://dx.doi.org/10.1149/2.0101911jes}}, doi = {{10.1149/2.0101911jes}}, volume = {{166}}, year = {{2019}}, }