Electrochemical study of the passive behaviour of Ni–Cr alloys in a borate solution—a mixed-conduction model approach

Bojinov, Martin; Fabricius, Gunilla; Kinnunen, Paavo K.J.; Laitinen, Timo; Mäkelä, Kari; Saario, Timo; Sundholm, G.

doi:10.1016/s0022-0728(01)00423-5

Cited by 77 publications

(44 citation statements)

References 34 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%

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%

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 current behavior in region C can be related to other factors: changes in the electronic characteristics of the film, the increase in the homogeneity of the oxide film or the decrease in defects inside the film. [25][26][27][28] Considering the results obtained until now, there was no experimental support to choose one of these factors responsible for the current plateau observed in the passive region. For the SS used in the present work, the potential and current values attributed to the transition between regions B and C is close to +0.4 V vs. Ag/AgCl/KCl sat.…”

Section: Resultsmentioning

confidence: 97%

Influence of ethanol, acidity and chloride concentration on the corrosion resistance of AISI 316L stainless steel

Ferreira¹,

Noce²,

Fugivara³

et al. 2013

J. Braz. Chem. Soc.

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A influência do etanol, ácido sulfúrico e cloreto na resistência à corrosão do aço 316L foi investigada por meio de curvas de polarização e medidas de espectroscopia de impedância eletroquímica. No intervalo estudado, o potencial de corrosão do aço foi independente das concentrações de H 2 SO 4 e NaCl em solução aquosa. Por outro lado, em solução contendo 65% (m/m) de etanol e 35% (m/m) de água, os potencias de corrosão foram mais altos do que os observados em solução aquosa. Além disso, o potencial de corrosão do aço foi alterado pela adição de H 2 SO 4 e NaCl em solução. Em soluções com e sem etanol, mais 0,35% (m/m) de NaCl, a presença de 1% (m/m) de H 2 SO 4 inibiu o aparecimento de corrosão puntiforme.The influence of ethanol, sulfuric acid and chloride on the corrosion resistance of 316L stainless steel was investigated by means of polarization curves and electrochemical impedance spectroscopy measurements. Over the studied range, the steel corrosion potential was independent of H 2 SO 4 and NaCl concentrations in aqueous solution. On the other hand, in solution containing 65 wt.% ethanol and 35 wt.% water, the corrosion potentials were higher than those obtained in aqueous solution. Besides, the steel corrosion potential was affected by the addition of H 2 SO 4 and NaCl in solution. In solutions with and without ethanol, plus 0.35 wt.% NaCl, the presence of 1 wt.% H 2 SO 4 inhibited the appearance of pitting corrosion.

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“…However, it becomes essentially resistive (semicircle in the Z plot) if the dissolution/growing of the passive film and cathodic reaction occur through the layer and at the oxide-solution interface. It has also been reported that the processes of passive dissolution at the anodic potential are governed by the electrical and mass transport properties of the passive layer [24][25][26][27]. However, at the mixed potential, the corrosion processes at the oxide/solution interface also need to be further investigated.…”

Section: Electrochemical Impedance Spectroscopic Measurementsmentioning

confidence: 99%

“…Therefore the anodic reaction is governed by electron and transport properties of the passive layer. Taking into ac- count the point defect model described in the literature by Macdonald et al [24,25] and modified by Bojinov et al [26,27] for the description of the passive dissolution of the anodically formed passive films of Fe-Cr and Ni-Cr alloys, the transport of interstitials or vacancies ¶ involves the outward movement of the cation defects (mainly Fe…”

Section: Electrochemical Impedance Spectroscopic Measurementsmentioning

confidence: 99%

Characterization of the passive films on electrodeposited Fe-Ni-Cr alloys in borate solution at pH 8.4

et al. 2007

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Abstract:The corrosion properties of the passive layers formed on iron-nickel-chromium electrodeposits of Fe 29 Ni 51 Cr 20 were investigated in 0.3 M borate solution at a' pH of 8.4. On the basis of measurements by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy, a low passive dissolution/corrosion rate was identified for the electrodeposited Fe-Ni-Cr alloys due to the nature of the established corrosion layer. The stability of this passive layer was further enhanced after corrosion under oxidizing conditions. Mössbauer spectroscopic measurements confirmed the existence of a thin passive layer on the amorphous electrodeposits.

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Electrochemical study of the passive behaviour of Ni–Cr alloys in a borate solution—a mixed-conduction model approach

Cited by 77 publications

References 34 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

Influence of ethanol, acidity and chloride concentration on the corrosion resistance of AISI 316L stainless steel

Characterization of the passive films on electrodeposited Fe-Ni-Cr alloys in borate solution at pH 8.4

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