Influence of the temperature of film formation on the electronic structure of oxide films formed on 304 stainless steel

Ferreira, M.G.S.; Hakiki, N. E.; Goodlet, G.; Faty, S.; Simões, A.M.; Belo, M. Da Cunha

doi:10.1016/s0013-4686(01)00658-2

Cited by 126 publications

(76 citation statements)

References 25 publications

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“…These results indicate that the protection provided by the passive film was predominantly due to the barrier layer. Similar results were obtained by other authors [36,[54][55][56].…”

Section: Equivalent Circuit and Interpretationsupporting

confidence: 92%

“…The superior corrosion resistance of austenitic stainless steels, such as Alloy UB6, is closely related to the passive film formed on their surface [33][34][35][36][37][38][39]. The compact inner layer, known as barrier layer, is composed principally of chromium oxides and is the major contribution.…”

Section: Equivalent Circuit and Interpretationmentioning

confidence: 99%

“…A constant-phase element (CPE) representing a shift from ideal capacitor was used instead of the capacitance itself. CPEs are used to model frequency dispersion behaviour corresponding to different physical phenomena such as surface heterogeneity which results from surface roughness, impurities, dislocations, and formation of porous layers [36,41,43,44]. The impedance of a constant-phase element is defined as…”

Section: Equivalent Circuit and Interpretationmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion Behaviour of a Highly Alloyed Austenitic Alloy UB6 in Contaminated Phosphoric Acid

Boudalia

Guenbour

Bellaouchou

et al. 2013

International Journal of Corrosion

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The influence of temperature ∘ C) on the electrochemical behaviour of passive films anodically formed on UB6 stainless steel in phosphoric acid solution (5.5 M H 3 PO 4 ) has been examined by using potentiodynamic curves, electrochemical impedance spectroscopy, and Mott-Schottky analysis. UB6 stainless steel in contaminated phosphoric acid is characterised by high interfacial impedance, thereby, illustrating its high corrosion resistance. The obtained results show that the films behave as n-type and p-type semiconductors in the potential range above and below the flat band potential, respectively. This behaviour is assumed to be the consequence of the semiconducting properties of the iron oxide and chromium oxide regions which compose the passive film.

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“…These results indicate that the protection provided by the passive film was predominantly due to the barrier layer. Similar results were obtained by other authors [36,[54][55][56].…”

Section: Equivalent Circuit and Interpretationsupporting

confidence: 92%

Section: Equivalent Circuit and Interpretationmentioning

confidence: 99%

Section: Equivalent Circuit and Interpretationmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion Behaviour of a Highly Alloyed Austenitic Alloy UB6 in Contaminated Phosphoric Acid

Boudalia

Guenbour

Bellaouchou

et al. 2013

International Journal of Corrosion

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“…For stainless steels, possible donors in the oxide structure are mainly cation interstitials, such as Fe 2+ metal ions, and oxygen vacancies [46,56,57]. values when the temperature of film formation increased [60]. As magnetite is a mixture of Fe 2 O 3 and FeO, its stoichiometry can vary from 0 to 0.5; then, the observed behaviour with temperature might be related to the formation of magnetite with a stoichiometry (x = Fe 2+ /Fe 3+ ) closer to 0 than to 0.5 when the samples are heated at 900…”

Section: Capacitance Measurementsmentioning

confidence: 99%

Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques

2015

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ElsevierSánchez Tovar, R.; Leiva García, R.; García Antón, J. (2015). Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques. Thin Solid Films. 576:1-10. doi:10.1016/j.tsf.2014.12.024. Regarding the electrochemical properties of these films, the corrosion resistance of the film tends to be lower with the heat treatment temperature, probably due to a more porous and heterogeneous scale. Mott Schottky plots show the n-type semiconductive behaviour of the films with donor densities that decrease with the enhancement of the temperature.

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“…From the Mott-Schottky plots of capacitance, they evaluated the semiconducting properties of passive films [5,7,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Several authors reported that the semiconductor type of the passive oxide was n-type [12,13,15,16].…”

Section: Introductionmentioning

confidence: 99%

Potential modulation reflectance of passivated type 304 stainless steel in sulfuric acid solution

Ohtsuka

Hyono

Sasaki

2012

Electrochimica Acta

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Potential modulation reflectance (PMR) was applied to passivated type 304 stainless steel covered by a passive oxide film in 0.1 mol dm −3 sulfuric acid solution.The ellipsometry measurements showed that the passive oxide film was 1.0 nm thick at the beginning of passivation at 0.1 V vs. Ag/ AgCl and increased to 1.8 nm with potential at 0.9 V in the transpassive region. Under positive bias, the signal intensity of PMR was proportional to the capacitance of the space charge formed in the n-type semiconducting passive oxide. The Mott-Schottky type plot was applicable to PMR as well as capacitance. From the plots the oxide film was found to behave as an n-type semiconducting layer. A threshold photon energy of 2.4 eV in the PMR-wavelength relation may correspond to the optical absorption edge of the passive oxide.

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Influence of the temperature of film formation on the electronic structure of oxide films formed on 304 stainless steel

Cited by 126 publications

References 25 publications

Corrosion Behaviour of a Highly Alloyed Austenitic Alloy UB6 in Contaminated Phosphoric Acid

Corrosion Behaviour of a Highly Alloyed Austenitic Alloy UB6 in Contaminated Phosphoric Acid

Characterization of thermal oxide films formed on a duplex stainless steel by means of confocal-Raman microscopy and electrochemical techniques

Potential modulation reflectance of passivated type 304 stainless steel in sulfuric acid solution

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