Passivity of Sanicro28 (UNS N-08028) stainless steel in polluted phosphoric acid at different temperatures studied by electrochemical impedance spectroscopy and Mott–Schottky analysis

Bensalah, M.; Sabot, R.; Triki, E.; Dhouibi, L.; Refait, Philippe; Jeannin, Marc

doi:10.1016/j.corsci.2014.04.056

Cited by 148 publications

(65 citation statements)

References 75 publications

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“…The donor and acceptors in oxide layers are defects consisted of cation vacancies, anion vacancies and cation interstitials. Cation vacancies yielding p-type character acts as the doping element which prevents migration of cation from the metal surface and penetration of harmful anions such as Cl − , F − and SO4 2− [36,40]. Thus, the semi-conductive properties of the oxide layer depend on the kind of oxide and the concentration of cation or anion vacancies.…”

Section: Mott-schottky Testsmentioning

confidence: 99%

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Corrosion Behavior of Pipeline Carbon Steel under Different Iron Oxide Deposits in the District Heating System

Kim

2017

Metals

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Abstract:The corrosion behavior of pipeline steel covered by iron oxides (α-FeOOH; Fe 3 O 4 and Fe 2 O 3 ) was investigated in simulated district heating water. In potentiodynamic polarization tests; the corrosion rate of pipeline steel is increased under the iron oxide but the increaseing rate is different due to the differnet chemical reactions of the covered iron oxides. Pitting corrosion was only observed on the α-FeOOH-covered specimen; which is caused by the crevice corrosion under the α-FeOOH. From Mott-Schottky and X-ray diffraction results; the surface reaction and oxide layer were dependent on the kind of iron oxides. The iron oxides deposit increases the failure risk of the pipeline and localized corrosion can be occurred under the α-FeOOH-covered region of the pipeline. Thus, prevention methods for the iron oxide deposit in the district pipeline system such as filtering or periodic chemical cleaning are needed.

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Section: Mott-schottky Testsmentioning

confidence: 99%

“…It is well known that there is a relationship between the surface film properties related to the semiconducting behavior of a surface film and the corrosion behavior of materials [35,36]. These properties and behavior can be investigated by analyzing the curves of a Mott-Schottky plot.…”

Section: Mott-schottky Testsmentioning

confidence: 99%

Corrosion Behavior of Pipeline Carbon Steel under Different Iron Oxide Deposits in the District Heating System

Kim

2017

Metals

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“…The n-type behavior in higher potential region C is probably due to the presence of additional free charge carriers (electrons) from an oxidation reaction [29], for example, S 2− to S, or due to the variation of the chemical composition of passive films during the polarization process [1]. ) as those in other studies [30][31][32][33]. As seen in Table 4, both N d and N a values were higher for stages 2 and 3 than for stage 1, indicating the negative effect of H 2 S on the protectiveness of the inner and outer layers.…”

Section: Mott-schottky Measurementsmentioning

confidence: 59%

Investigation of the deterioration of passive films in H2S-containing solutions

Wang

Zhang

Tang

et al. 2017

Int J Miner Metall Mater

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Abstract:The effect of H 2 S on the corrosion behavior of 316L stainless steel was investigated using electrochemical methods by changing the gas condition from CO 2 to H 2 S and then back to CO 2 . The presence of H 2 S showed an acceleration effect on the corrosion of 316L stainless steel in comparison with CO 2 . The acceleration effect remained even after the complete removal of H 2 S by CO 2 , indicating that the passive film was irreversibly damaged. X-ray photoelectron spectroscopy (XPS) analysis indicated that the passive film was composed of Cr 2 O 3 , Fe 2 O 3 , and FeS 2 after being immersed in H 2 S-containing solutions. The semiconducting property of the passive film was then investigated by using the Mott-Schottky approach. The presence of sulfides resulted in higher acceptor and donor densities and thus was responsible for the deterioration of passive films.

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“…Therefore, semiconducting properties are often observed on the passive films. Passivity of stainless steel is usually attributed to the formation of a mixture of iron and chromium oxide film with semiconducting behavior [25]. Mott-Schottky analysis has been extensively used to study the semiconducting properties of the passive films.…”

Section: Effect Of Temperaturementioning

confidence: 99%

Electrochemical Corrosion Behavior of Duplex Stainless SteelAISI 2205 in Ethylene Glycol-Water Mixture in the Presence of50 W/V % LiBr

Goodarzi¹,

Danaee²,

Ebrahimi³

et al. 2016

Journal of Electrochemical Science and Technology

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The corrosion behavior of duplex stainless steel AISI 2205 was investigated in ethylene glycol-water mixture in the presence of 50 W/V % LiBr at different concentrations and different temperatures. Cyclic polarization, impedance measurements and Mott-Schottky analysis were used to study the corrosion behavior the semi conductive properties of the passive films. The results showed that with increasing in the ethylene glycol concentration to 10 V/V%, the corrosion rate of the steel alloy substrate increased. In higher concentrations of ethylene glycol, corrosion current of steel decreased. The results of scanning electron microscopy of electrode surface confirmed the electrochemical tests. Electrochemical experiment showed that duplex steel was stable for pitting corrosion in this environment. The increase in the ethylene glycol concentration led to increasing the susceptibility to pitting corrosion. The corrosion current increased as the temperature rise and also pitting potentials and repassivation potentials shifted towards the less positive values as the temperature increased. According to Mott-Schottky analysis, passive films of stainless steel at the different temperatures showed both n-type and p-type semiconductor behavior in different potential.

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Passivity of Sanicro28 (UNS N-08028) stainless steel in polluted phosphoric acid at different temperatures studied by electrochemical impedance spectroscopy and Mott–Schottky analysis

Cited by 148 publications

References 75 publications

Corrosion Behavior of Pipeline Carbon Steel under Different Iron Oxide Deposits in the District Heating System

Corrosion Behavior of Pipeline Carbon Steel under Different Iron Oxide Deposits in the District Heating System

Investigation of the deterioration of passive films in H2S-containing solutions

Electrochemical Corrosion Behavior of Duplex Stainless SteelAISI 2205 in Ethylene Glycol-Water Mixture in the Presence of50 W/V % LiBr

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