Direct imaging of native passive film on stainless steel by aberration corrected STEM

Hamada, Etsuo; Yamada, K.; Nagoshi, Masayasu; Makiishi, Noriko; Sato, Kaoru; Ishii, Takeshi; Fukuda, Kazuma; Ishikawa, Shin; Ujiro, Takumi

doi:10.1016/j.corsci.2010.08.025

Cited by 95 publications

(44 citation statements)

References 17 publications

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“…In general, the composition of the film determined by XPS was in agreement with literature reports that the oxides of Fe, Cr and Ni are the chief contributors to the SS passive film (Hamada et al 2010), regardless of the presence of a conditioning film (Landoulsi, Genet, et al 2008) or under simulated conditions of biofilm growth (Marconnet, Wouters, et al 2008). The XPS spectra in Figure 4 and the molar concentrations in Table 2 provided overwhelming evidence that the growth of the passive film was associated with an enrichment of Fe ox under all test conditions, particularly under illumination.…”

Section: Discussionsupporting

confidence: 79%

“…In view of the inherent delicacy of the passive film, which is usually of the order of only a few nm in thickness (eg Hamada et al 2010), gentle swabbing with cotton wool soaked first in acetone and then in ethanol was employed. The swabbing was repeated numerous times, in all cases by the same investigator, to remove as much of the biological material as possible.…”

Section: Sample Preparation For Surface Analyses and Epifluorescence mentioning

confidence: 99%

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The enrichment of surface passive film on stainless steel during biofilm development in coastal seawater

et al. 2015

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The surface passive film on UNS S30400 alloy was characterized before and after biofilm development under different regimes of diurnal lighting in quiescent flowing coastal seawater. As exemplified by atomic force microscopy, the passive film grew under all test conditions with conspicuous variations in morphological features. X-ray photon spectroscopy illustrated an enrichment of the outer film by iron oxide and a progressive increase in the iron oxide/chromium oxide ratio with lighting. Mott-Schottky plots reflected the duplex nature of the film, comprising an outer n-type and an inner p-type configuration. The slopes of the plots showed a strong decrease in donor and acceptor densities with biofilm coverage and lighting, thus confirming passive film growth. These results provide new insights that passive film enrichment is an intrinsic process under practical marine conditions, and show that the evolution of the passive film is a key step to sustained passivity and/or its breakdown by microbial mechanisms.

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Section: Discussionsupporting

confidence: 79%

Section: Sample Preparation For Surface Analyses and Epifluorescence mentioning

confidence: 99%

The enrichment of surface passive film on stainless steel during biofilm development in coastal seawater

et al. 2015

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“…[26] During the laser processing, the temperature in the laser maxima can reach over 1800°C. [40,41] Furthermore, Merz reported that for the used steel, the protective nature is due to a continuous Cr 2 O 3 film during initial oxidation stages. [36,37] More recent studies analyzing the oxidation behavior of 304 stainless steel are in good agreement with regard to the enrichment and depletion of Cr in the different zones.…”

Section: Atom Probe Tomographymentioning

confidence: 99%

Oxide Formation, Morphology, and Nanohardness of Laser‐Patterned Steel Surfaces

et al. 2015

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A large variety of tribological research studies dealt with the effect of laser induced surface textures and the respective parameters such as depth, feature diameter, and area density on the tribological efficiency. However, only few studies have examined chemical and microstructural changes induced by the laser-patterning process, which can have a significant impact on the tribological properties. The aim of this study is to analyze the surface chemistry of laser-induced line-like patterns with a structural wavelength of 18 mm on steel surfaces (AISI 304), i.e., oxide scale thickness and morphology, prior to and after laser processing. X-ray photoelectron spectroscopy combined with an Argon ion sputtering facility was used to measure depth profiles of the iron-and chromium oxide layer. A subsequent analysis performed by atom probe tomography demonstrated that the laser interference patterning leads to an increased iron-and chromium oxide layer by a factor of 8 compared to the polished unpatterned reference surface and to a change in the oxide morphology from a solid solution in the reference to a layered structure in the laser-patterned state. Nanoindentation experiments revealed that the nano-hardness in the laser-intensity maximum position is two times larger than in the reference position. Finally, hardness calculations assuming a bilayer model correlate the observed nano-hardness with the measured surface chemistry.

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“…It has been demonstrated that the native oxide film formed on FeeCr alloys is strongly related to the alloy composition and that a critical composition exists corresponding to a change in the oxide chemistry [16]. Several studies regarding the 304 series SS have evidenced that i) the native passive layer is formed principally by iron and chromium, with chromium situated in the inner zone of the layer, ii) nickel is less prone to be oxidised and it has been found at the interface between the passive film and the substrate [17].…”

Section: Resultsmentioning

confidence: 98%

The effect of surface treatment with atmospheric pressure plasma jet, generated by air, on corrosion properties of AISI 304L stainless steel

Brunelli

Gottardello

Napolitani³

et al. 2012

Materials Chemistry and Physics

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Direct imaging of native passive film on stainless steel by aberration corrected STEM

Cited by 95 publications

References 17 publications

The enrichment of surface passive film on stainless steel during biofilm development in coastal seawater

The enrichment of surface passive film on stainless steel during biofilm development in coastal seawater

Oxide Formation, Morphology, and Nanohardness of Laser‐Patterned Steel Surfaces

The effect of surface treatment with atmospheric pressure plasma jet, generated by air, on corrosion properties of AISI 304L stainless steel

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