Simulating porous oxide films on zirconium alloys

Cox, B.; Wong, Y.-M.

doi:10.1016/0022-3115(94)00653-9

Cited by 40 publications

(15 citation statements)

References 4 publications

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“…The occurrence of short-circuits sometimes reported in the literature for Zy-4 [16,17] was not detected for ZrNbO. Short-circuits are often proposed to result from the local conduction of intermetallic particles (mainly b-Nb with a mean diameter close to 50 nm and few Zr(Nb,Fe,Cr) 2 smaller than 300 nm for ZrNbO).…”

Section: Cell Potentialmentioning

confidence: 88%

“…The interpretation of impedance diagrams in situ recorded during corrosion of zirconium alloys in high temperature water or by ex situ characterization in liquid medium at room temperature [4,5,[17][18][19][20][21][22] is still controversial. Electrical contributions are sometimes associated with the oxide response only [18,20,22] or the Faradaic process [23].…”

Section: In Situ Electrochemical Characterizationsmentioning

confidence: 99%

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Contribution to the understanding of the ZrNb(l%)O(0.13%) oxidation mechanism at 500 °C in dry air

Vermoyal¹,

Frichet²,

Dessemond³

2004

Journal of Nuclear Materials

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Section: Cell Potentialmentioning

confidence: 88%

Section: In Situ Electrochemical Characterizationsmentioning

confidence: 99%

Contribution to the understanding of the ZrNb(l%)O(0.13%) oxidation mechanism at 500 °C in dry air

Vermoyal¹,

Frichet²,

Dessemond³

2004

Journal of Nuclear Materials

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“…It is thought to arise from a distribution of the relaxation times resulting from heterogeneities of microscopic level at oxide/electrolyte interface [6,9,10]. According to Cox and Wong, the CPE behavior is attributed to a geometric origin, such as, surface heterogeneity or surface roughness [11]. The factor n or CPE power is therefore, also known as roughness coefficient.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Passive Film Properties and Pitting Resistance of AISI 316 in Aqueous Ethanoic Acid Containing Chloride Ions using Electrochemical Impedance Spectroscopy(EIS)

Mahato

Singh

2011

Port. Electrochim. Acta

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The structure and properties of the passive film formed on the surface of AISI 316 stainless steel in aqueous ethanoic acid have been investigated using EIS. Experiments were carried out at 30 ºC in different concentrations of ethanoic acid. Effects on the film properties due to the change of electrode potential, exposure durations and addition of chloride ions to the electrolyte were also studied. Impedance parameters were determined using simple model and equivalent electrical circuit. Results suggest the formation of multilayered passive film on the steel surface. The film possessed dual structure. Inner layers were thin and compact, whereas the outer layer was porous and defective. The measured capacitive behavior was of non ideal nature and hence replaced by constant phase element or CPE. Formation of the passive film and the change in its structure has been explained using impedance parameters.

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“…Since R pore increases, the Y o (admittance) should be decreased and it is confirmed by the calculated values of electrical parameters. Initially, the coating surface was rough so that the Y o was high and indicated higher double layer capacitance [52], but as exposure periods are increased, this value became less. This result indicates that the passive film became non-porous and protective.…”

Section: Electrochemical Impedance Spectroscopy (Eis) Evaluation Of Cmentioning

confidence: 99%

Corrosion Resistance Properties of Aluminum Coating Applied by Arc Thermal Metal Spray in SAE J2334 Solution with Exposure Periods

Lee

Singh

Ismail

et al. 2016

Metals

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Arc thermal metal spray coating provides excellent corrosion, erosion and wear resistance to steel substrates. This paper incorporates some results of aluminum coating applied by this method on plain carbon steel. Thereafter, coated panels were exposed to an environment known to form stable corrosion products with aluminum. The coated panels were immersed in Society of Automotive Engineers (SAE) J2334 for different periods of time. This solution consists of an aqueous solution of NaCl, CaCl 2 and NaHCO 3 . Various electrochemical techniques, i.e., corrosion potential-time, electrochemical impedance spectroscopy (EIS) and the potentiodynamic were used to determine the performance of stimulants in improving the properties of the coating. EIS studies revealed the kinetics and mechanism of corrosion and potentiodynamic attributed the formation of a passive film, which stifles the penetration of aggressive ions towards the substrate. The corrosion products that formed on the coating surface, identified using Raman spectroscopy, were Dawsonite (NaAlCO 3 (OH) 2 ) and Al(OH) 3 . These compounds of aluminum are very sparingly soluble in aqueous solution and protect the substrate from pitting and uniform corrosion. The morphology and composition of corrosion products determined by scanning electron microscopy and energy dispersive X-ray analyses indicated that the environment plays a decisive role in improving the corrosion resistance of aluminum coating.

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Simulating porous oxide films on zirconium alloys

Cited by 40 publications

References 4 publications

Contribution to the understanding of the ZrNb(l%)O(0.13%) oxidation mechanism at 500 °C in dry air

Contribution to the understanding of the ZrNb(l%)O(0.13%) oxidation mechanism at 500 °C in dry air

Investigation of Passive Film Properties and Pitting Resistance of AISI 316 in Aqueous Ethanoic Acid Containing Chloride Ions using Electrochemical Impedance Spectroscopy(EIS)

Corrosion Resistance Properties of Aluminum Coating Applied by Arc Thermal Metal Spray in SAE J2334 Solution with Exposure Periods

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