XAS and XRD in situ characterisation of reduction and reoxidation processes of iron corrosion products involved in atmospheric corrosion

Monnier, Judith; Réguer, Solenn; Foy, Eddy; Testemale, Denis; Mirambet, F.; Saheb, Mandana; Dillmann, Philippe; Guillot, Ivan

doi:10.1016/j.corsci.2013.10.012

Cited by 51 publications

(40 citation statements)

References 35 publications

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“…It is well described in the literature that the formation of one or the other forms of the iron oxyhydroxides can be controlled by pH, rate of oxidation and electrolyte composition. 4,[32][33][34] …”

Section: Reoxidation Of the γ-Feooh Electrodes-inmentioning

confidence: 99%

“…The complex electrochemical behavior of iron in aqueous solution has been studied in detail in the corrosion community [4][5][6][7][8][9][10][11] and is well described. Reduction of γ-FeOOH on other substrates has been studied previously and there is a general understanding that Fe(OH) 2 is formed.…”

mentioning

confidence: 99%

“…Depending on pH and composition of the electrolyte also magnetite can be formed, preferentially by a dissolution precipitation reaction. [12][13][14][15] In-situ techniques such as Mößbauer 9 and Raman 5,7,11 spectroscopy as well as X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) 4 have been used to track the state of the surface during electrochemical polarization. In most cases neutral to slightly alkaline or strongly alkaline solutions were used, where the reduction of iron oxides and hydroxides yield soluble Fe(II) species.…”

mentioning

confidence: 99%

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In-Situ Raman Spectroscopy of α- and γ-FeOOH during Cathodic Load

Hedenstedt

Bäckström

Ahlberg

2017

J. Electrochem. Soc.

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Water reduction on corroded iron surfaces is technologically and fundamentally important. Here, the technological interest originates from the chlorate process where water reduction is the main cathodic process. Fundamentally, water reduction on oxide surfaces raises questions on the stability of the oxide and the nature of electrocatalytic surface sites. Two iron oxyhydroxides, αand γ-FeOOH, were electrodeposited on titanium substrate and their reduction processes were followed in detail with in-situ Raman spectroscopy, using low incident laser power to avoid sample damaging. Polarization to negative potentials show two reduction peaks for γ-FeOOH and one peak for α-FeOOH prior to hydrogen evolution. The characteristic Raman peaks gradually disappear as the potential is made more negative but no new peaks can be observed. δ-FeOOH was detected as an intermediate phase upon oxidation of the reduced surface layer. This indicates that Fe(OH) 2 is formed during cathodic polarization and initially re-oxidized to the isostructural δ-FeOOH. Characteristic Raman signals of the original phases appear upon further oxidation in air.

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Section: Reoxidation Of the γ-Feooh Electrodes-inmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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In-Situ Raman Spectroscopy of α- and γ-FeOOH during Cathodic Load

Hedenstedt

Bäckström

Ahlberg

2017

J. Electrochem. Soc.

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“…6 and 7. The X-ray absorption signal of Feesculin compound is slightly different, and show a shoulder at 7150 eV on the XANES spectra and at 5.5 Å −1 on the EXAFS spectra, characteristic of the presence of an iron oxyhydroxide FeOOH (the example of ferrihydrite was chosen) [30,31].…”

Section: Veys-renaux Et Almentioning

confidence: 99%

Conversion of steel by polyphenolic model molecules: Corrosion inhibition mechanism by rutin, esculin, esculetol

et al. 2018

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A B S T R A C TThis paper focuses on the potential corrosion protection of steel in presence of three polyphenolic model molecules (rutin, esculin, esculetol) in a weak acidic medium (pH = 4). From an electrochemical point of view, the cathodic inhibition was attributed to the oxygen scavenger role of the considered antioxidant compounds. SEM observations, Raman spectroscopy and Synchrotron X-ray absorption spectroscopy revealed furthermore the formation of a surface film by precipitation of iron polyphenolate conversion products, in which iron III is likely coordinated with free-catechol groups. Glycosylated catechol groups are rather adsorbed on a FeOOH layer.

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“…Monnier et al [29] used in situ XAS to investigate the reduction and re-oxidation of atmospheric corrosion of iron. The study was performed in transmission mode at iron K edge with a Si (220) monochromator.…”

Section: Emerging Analytical Techniques For Surface Characterization mentioning

confidence: 99%

Emerging surface characterization techniques for carbon steel corrosion: a critical brief review

2017

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Carbon steel is a preferred construction material in many industrial and domestic applications, including oil and gas pipelines, where corrosion mitigation using film-forming corrosion inhibitor formulations is a widely accepted method. This review identifies surface analytical techniques that are considered suitable for analysis of thin films at metallic substrates, but are yet to be applied to analysis of carbon steel surfaces in corrosive media or treated with corrosion inhibitors. The reviewed methods include time of flight-secondary ion mass spectrometry, X-ray absorption spectroscopy methods, particle-induced X-ray emission, Rutherford backscatter spectroscopy, Auger electron spectroscopy, electron probe microanalysis, near-edge X-ray absorption fine structure spectroscopy, X-ray photoemission electron microscopy, low-energy electron diffraction, small-angle neutron scattering and neutron reflectometry, and conversion electron Moessbauer spectrometry. Advantages and limitations of the analytical methods in thin-film surface investigations are discussed. Technical parameters of nominated analytical methods are provided to assist in the selection of suitable methods for analysis of metallic substrates deposited with surface films. The challenges associated with the applications of the emerging analytical methods in corrosion science are also addressed.

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XAS and XRD in situ characterisation of reduction and reoxidation processes of iron corrosion products involved in atmospheric corrosion

Cited by 51 publications

References 35 publications

In-Situ Raman Spectroscopy of α- and γ-FeOOH during Cathodic Load

In-Situ Raman Spectroscopy of α- and γ-FeOOH during Cathodic Load

Conversion of steel by polyphenolic model molecules: Corrosion inhibition mechanism by rutin, esculin, esculetol

Emerging surface characterization techniques for carbon steel corrosion: a critical brief review

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