Coupling between ionic defect structure and electronic conduction in passive films on iron, chromium and iron–chromium alloys

Bojinov, Martin; Fabricius, Gunilla; Laitinen, Timo; Mäkelä, Kari; Saario, Timo; Sundholm, G.

doi:10.1016/s0013-4686(99)00423-5

Cited by 159 publications

(105 citation statements)

References 50 publications

Supporting

Mentioning

102

Contrasting

Order By: Relevance

“…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%

“…Clearly, if n=1 then Y has the meaning of a capacitance in F cm −2 . If the value of exponent n is between 0.5-1 then Z CP E ¶ According to the notation proposed by Kröger and Vink [31] the typical defects in a spinel-type lattice of iron-oxide passive films [26]: Fe can be related to a non-ideal double layer capacitance with distributed coupling of the double layer capacitance of a rough or porous surface with the electrolyte resistance, or in the case of passive films, it has been shown [23,33] in the literature that the constant phase behaviour can be caused by the inhomogeneity of conductivity in the depth of the film. For the electrodeposits corroded either in a de-aerated solution or exposed to air, the calculated Y CP E parameter in Table 3 The phase shift vs. frequency plot (curve 2) in Figures 7c and 8c reveal that at the high frequency part of the diagram there is no sign of an HF time constant for the electrodeposited alloy corroded in de-aerated solution compared with the corroded alloy in an aerated condition.…”

Section: +mentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2007

View full text Add to dashboard Cite

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.

show abstract

Section: Electrochemical Impedance Spectroscopic Measurementsmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopic Measurementsmentioning

confidence: 99%

Section: +mentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Both the steady state current and impedance response of a metal covered with a passive film in contact with an electrolyte have been derived and successfully compared to experimental data [44][45][46][47]. In recent years, the model was further developed at VTT [36,43,48,49] and by others [50,51]. The main addition proposed by VTT in terms of the mixedconduction model (MCM) was the derivation of the Young impedance (Eq.…”

Section: Kinetic Models For the Asymmetrical Configurationmentioning

confidence: 99%

Fundamental Understanding of Crack Growth in Structural Components of Generation IV Supercritical Light Water Reactors

Balachov¹,

Kobayashi²,

Tanzella³

et al. 2004

View full text Add to dashboard Cite

REPORT DOCUMENTATION PAGEForm Approved OMB NO. Public Reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comment regarding this burden estimates or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and This work contributes to the design of safe and economical Generation-IV Super-Critical Water Reactors (SCWRs) by providing a basis for selecting structural materials to ensure the functionality of in-vessel components during the entire service life. During the second year of the project, we completed electrochemical characterization of the oxide film properties and investigation of crack initiation and propagation for candidate structural materials steels under supercritical conditions. We ranked candidate alloys against their susceptibility to environmentally assisted degradation based on the in situ data measured with an SRI-designed controlled distance electrochemistry (CDE) arrangement. A correlation between measurable oxide film properties and susceptibility of austenitic steels to environmentally assisted degradation was observed experimentally. One of the major practical results of the present work is the experimentally proven ability of the economical CDE technique to supply in situ data for ranking candidate structural materials for Generation-IV SCWRs. A potential use of the CDE arrangement developed at SRI for building in situ sensors for monitoring water chemistry in the heat transport circuit of Generation-IV SCWRs was evaluated and proved to be feasible. Understanding basic phenomena. Kinetic parameters of the charge and mass transport processes in the metal/oxide film/supercritical water system are derived from in situ oxide film studies to understand and quantify the rate-controlling processes and, eventually, the fundamentals of the metal oxidation phenomenon at supercritical temperatures. Providing a basis for the development of new alloys. Integration of the in situexperimental information on oxide film resistance to charge and mass transport for alloys of various compositions, along with fracture surface analysis and current theoretical understanding of the relationship between properties of the oxide films and stability of materials, is expected to aid in material selection and the development process. It will do so by providing recommendations for chemical compositions of the alloys in regard to their expected locations in the reactor (or more specifically, in regard to local temperature and oxidizing conditions). 1 WORK PERFORMED AND PRELIMINARY RESULTSDuring this project, SRI completed the electrochemical characterization of the oxide film prop...

show abstract

“…It still represents a special and favorite topic for electrochemists and material scientists on this topic [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In general, passive film on the surface of stainless steel could be interpreted in terms of a semiconductive film.…”

Section: Introductionmentioning

confidence: 99%

Semiconducting Behavior of Carbon Steel in Electrolyte Solution

Zhong¹,

Wang²,

Lu³

et al. 2008

TOCORRJ

View full text Add to dashboard Cite

Abstract:In this paper, the semiconducting behavior of carbon steel in acid, base and salt solutions was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that the capacitance variation of space charge layer of carbon steel in different solution was different. The carbon steel showed p-type semiconducting behavior in 5% sulfuric acid and 5% sodium sulfate solution. However, the carbon steel showed n-type semiconducting behavior in 5% sodium hydroxide. It was suggested that the space charge layer of the carbon steel in different electrolytes might be asymmetric.

show abstract

Coupling between ionic defect structure and electronic conduction in passive films on iron, chromium and iron–chromium alloys

Cited by 159 publications

References 50 publications

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

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

Fundamental Understanding of Crack Growth in Structural Components of Generation IV Supercritical Light Water Reactors

Semiconducting Behavior of Carbon Steel in Electrolyte Solution

Contact Info

Product

Resources

About