Determination of effective capacitance and film thickness from constant-phase-element parameters

Hirschorn, Bryan; Orazem, Mark E.; Tribollet, Bernard; Vivier, Vincent; Frateur, Isabelle; Musiani, Marco

doi:10.1016/j.electacta.2009.10.065

Cited by 2,000 publications

(869 citation statements)

References 63 publications

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“…The circulation of cathodic current induces a pH shift towards alkaline values which promotes the growth of calcareous deposits [5,15,22] and enhances the repair of the reduced oxide film on the surface [41][42][43].…”

Section: Discussionmentioning

confidence: 99%

“…It is known that stainless steel has excellent corrosion resistance in the alkaline solution with high pH value [43,[49][50][51], which is related to a thin but very protective oxide film formed on the surface. Therefore, the R ox increases with the continuing cathodic polarization at the later stage.…”

Section: Discussionmentioning

confidence: 99%

“…After finishing the surface with abrasive paper, there is still a thin oxide film on the surface of the stainless steel sample as revealed by the Rox for the fresh sample before cathodic polarization. The passive film of stainless steel generally has a bilayer structure, with the outermost layer of oxide/hydroxide enriched in iron, and an inner layer predominantly rich in chromium and nickel oxides [43,[45][46][47][48]. Cathodic polarization …”

Section: Discussionmentioning

confidence: 99%

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

“…The fast decrease of Rct at the first stage may be related to the degradation of the oxide film on the surface of 304 SS with cathodic polarization at −0.80 V [41]. The following increase of Rct gradually may be attributed to the repair of the passive film because of the alkaline environment formed due to cathodic polarization [42,43]. At the first stage before the 10-h polarization, Figure 4a is considered to be suitable for representing the electrode processes, which are dominated by the corrosion reaction of metal and the effect of passive film [30,39,40].…”

Section: Eis Evolution Of 304 Ss Withmentioning

confidence: 99%

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Evolution of Calcareous Deposits and Passive Film on 304 Stainless Steel with Cathodic Polarization in Sea Water

Sun

Huang

et al. 2018

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Abstract:The change of protective current density, the formation and growth of calcareous deposits, and the evolution of passive film on 304 stainless steel (SS) were investigated at different potentials of cathodic polarization in sea water. Potentiostatic polarization, electrochemical impedance spectroscopy (EIS), and surface analysis techniques of scanning electron microscopy (SEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction (XRD) were used to characterize the surface conditions. It was found that the protective current density was smaller for keeping polarization at −0.80 V (vs. saturated calomel electrode (SCE), same as below) than that at −0.65 V. The calcareous deposits could not be formed on 304 SS with polarization at −0.50 V while it was well protected. The formation rate, the morphology, and the constituent of the calcareous deposits depended on the applied potential. The resistance of passive film on 304 SS decreased at the first stage and then increased when polarized at −0.80 V and −0.65 V, which was related to the reduction and the repair of passive film. For the stainless steel polarized at −0.50 V, the film resistance increased with polarization time, indicating that the growth of oxide film was promoted.

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