The bi-layer structure and the higher compactness of a passive film on nanocrystalline 304 stainless steel

Gui, Yong; Zheng, Zhaohui; Gao, Yan

doi:10.1016/j.tsf.2015.12.039

Cited by 70 publications

(41 citation statements)

References 39 publications

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“…It is worth noting that the atomic percentages of Cr and Cu in 316L SS and 316L-Cu SS at 0 s of etching time were lower than those in the inner layer of passive films. This was related to the bi-layer structure of passive film, where the outer layer was enriched in iron oxide and the inner layer was enriched in chromium oxide[38]. Lin et al observed the similar phenomenon for Cu-bearing SS (Fe-18Cr-8Ni-xCu) passivated in sulfuric acid solution[39].…”

mentioning

confidence: 82%

Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel

Zhao

Shahzad

et al. 2016

Applied Surface Science

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mentioning

confidence: 82%

Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel

Zhao

Shahzad

et al. 2016

Applied Surface Science

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“…Prior to the electrochemical studies the electrode surface was polished with 3000 SiC sandpaper, cleaned with distilled water and acetone, and then dried in air. Before each measurement the electrode was polarized cathodically at − 1.0 V SCE for 5 min to remove the natural passive films on the surface [27]. The potentiodynamic polarization tests were carried out at 1.67 mV/s and the potential range from − 1.2 V SCE to 1.0 V SCE .…”

Section: Specimen Preparationmentioning

confidence: 99%

“…The main reason is that there are some limitations in PDM I which we use. Firstly, the passive film formed on stainless steel is bi-layer films (proved in Sections 3.4 and 3.5), (27) whereas it was supposed that the passive film is a single layer for calculating. Secondly, there are more defects in the film such as interstitials in addition to cation vacancies and oxygen vacancies.…”

Section: Diffusivity Of Defectsmentioning

confidence: 99%

Characterization of Passive Films Formed on As-received and Sensitized AISI 304 Stainless Steel

Zhang

Luo

Zhong

et al. 2019

Chin. J. Mech. Eng.

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The current research of corrosion resistance of stainless steels mainly focuses on characterization of the passive films by point defect mode and mixed-conduction model. The corrosion resistance of the passive films formed on asreceived and sensitized AISI304 stainless steel in borate buffer solution were evaluated in this paper. The degree of sensitization and corrosion resistance of AISI304 stainless steels was evaluated by double loop electrochemical potentiodynamic reactivation and electrochemical impedance spectroscopy. The passive films formed on the stainless steels were studied by XPS technique. It was found that as-received specimen had higher pitting corrosion potential and corrosion resistance than sensitized one. The Mott-Schottky results showed that sensitized stainless steel had more defects in the passive film than as-received one. The compositions of the passive films were mainly Cr and Fe oxides according to XPS results.

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“…The positive slope indicates n-type semiconductor and is associated with the Fe-rich outer layer of the passive film formed on stainless steels where oxygen vacancies and cation interstitials are the major dopants 51 . The donor (N D ) density can be calculated from the linear part The point defect model (PDM) 53,54 can be used to draw some conclusions about the passive film on the AISI 409 stainless steels. As stated in the PDM, oxygen vacancies on the surface of the passive film can react with chloride ions.…”

Section: (5) (6)mentioning

confidence: 99%

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

et al. 2017

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The aim of the present work was to study the passive film stability and pitting corrosion behavior of the AISI 409 stainless steel. The electrochemical tests were carried out in 0.1 M NaCl solution at room temperature. The general electrochemical behavior was assessed using electrochemical impedance spectroscopy (EIS) measurements whereas the semiconducting properties of the passive film were evaluated by the Mott-Schottky approach. Pitting corrosion was investigated using potentiodynamic and potentiostatic polarization tests. Surface morphology was examined using confocal laser scanning microscopy and scanning electron microscopy (SEM). Energy dispersive X-ray spectroscopy (EDS) analyses were carried out to identify the composition of precipitates that could act as preferential sites for the onset of pitting corrosion. The results showed that the passive film presents n-type semiconductive behavior. Grain boundaries played an important role as pitting initiation sites for the AISI 409 stainless steel.

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The bi-layer structure and the higher compactness of a passive film on nanocrystalline 304 stainless steel

Cited by 70 publications

References 39 publications

Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel

Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel

Characterization of Passive Films Formed on As-received and Sensitized AISI 304 Stainless Steel

Electrochemical Study of the AISI 409 Ferritic Stainless Steel: Passive Film Stability and Pitting Nucleation and Growth

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