Effect of the surrounding aeration on microcapillary electrochemical cell experiments

Oltra, R.; Vuillemin, Bruno; Thébault, Florian; Rechou, F.

doi:10.1016/j.elecom.2008.03.014

Cited by 20 publications

(14 citation statements)

References 10 publications

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“…In previous papers, we ascribed this decrease of the cathodic activity to a cathodic inhibition of oxygen reduction resulting from a deposition of corrosion products on the steel surface [15,18,14]. It must be noted that the high cathodic current densities (between 0.1 and 10 mA cm À2 ) measured in the microcapillary electrochemical cell configurations were attributed to the oxygen permeability of the silicone gasket surrounding the microcapillary cell [23].…”

Section: Local Polarization Curvesmentioning

confidence: 95%

Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel

et al. 2015

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Section: Local Polarization Curvesmentioning

confidence: 95%

Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel

et al. 2015

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“…11shows the anodic polarization curves of the protective layer generated in the scribe of the lithium-leaching coatings after different periods of neutral salt spray exposure. Cathodic polarization measurements were not considered since their interpretation can be misleading(27). The silicone gasket at the end of the micro-capillary is permeable to oxygen.…”

mentioning

confidence: 99%

Electrochemical Evaluation of Corrosion Inhibiting Layers Formed in a Defect from Lithium-Leaching Organic Coatings

Visser

Meeusen

González-García

et al. 2017

J. Electrochem. Soc.

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14This work presents the electrochemical evaluation of protective layers generated in a 15 coating defect from lithium-leaching organic coatings on AA2024-T3 aluminum 16 alloys as a function of neutral salt spray exposure time. Electrochemical impedance 17 spectroscopy was used to study the electrochemical properties on a macroscopic 18scale. An electrochemical model allowed to quantitatively link the electrochemical 19 behavior with the physical model of the layer in the damaged area as studied by 20 scanning electron microscopy. Local potentiodynamic polarization curves obtained 21 from micro-cell measurements showed an increase of the passive range in the defect 22 area due to the formation of a robust protective layer. Scanning vibrating electrode 23 technique measurements confirmed the non-reversible long-term corrosion protection 24 of these generated layers in the coating defect. 25 26

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“…FEM modeling can also provide a powerful tool to optimize the corrosion testing arrangements and even design innovative corrosion test methods. Oltra and his coworkers [104][105][120][121] have published several papers combining FEM and experimental work aimed at optimization of testing setups to achieve more accurate characterization and measurement for localized corrosion process. For instance, the microelectrochemical capillary cell technique is widely used to characterize local electrochemical kinetics (e.g., of intermetallic compounds in an alloy matrix).…”

Section: Corrosion Test Designmentioning

confidence: 99%

“…To avoid the electrolyte leakage out of the capillary cell, silicone rubber is generally applied right outside the cell 122 displayed in Figure 12. Oltra, et al, [120][121] developed a numerical study to show that diffusion controlled ORR cathodic kinetics was artificially intensified due to diffusion of oxygen through the silicone rubber. An optimized cell design was proposed based on the simulation in which an external argon gas shielding was utilized to prevent oxygen from entering the testing solution, resulting in a lower (and more realistic) ORR diffusion limiting current density.…”

Section: Corrosion Test Designmentioning

confidence: 99%

A Review of the Application of Finite Element Method (FEM) to Localized Corrosion Modeling

Kelly

2019

CORROSION

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The modeling of localized corrosion has usually focused on calculating the spatial and/or temporal distributions of chemical species, potential, and current. These are affected by the reactions considered, the geometry, and the modes of mass transport of importance. Finite element method (FEM) is a numerical technique to obtain approximate solutions to the differential equations based on different types of discretization in which the domain of interest is divided into different types of elements. The introduction of the FEM opened a variety of opportunities for increasing the complexity, and therefore the fidelity, of the localized corrosion conditions considered. This article first briefly introduces the FEM technique before describing the choices the modeler has with regards to the governing equations for the system. The history of the application of FEM to localized corrosion is given, highlighting the different aspects of localized corrosion that have been successfully modeled. Finally, some of the current challenges in FEM modeling of localized corrosion are outlined.

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Effect of the surrounding aeration on microcapillary electrochemical cell experiments

Cited by 20 publications

References 10 publications

Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel

Influence of magnesium content on the corrosion resistance of the cut-edges of Zn–Mg-coated steel

Electrochemical Evaluation of Corrosion Inhibiting Layers Formed in a Defect from Lithium-Leaching Organic Coatings

A Review of the Application of Finite Element Method (FEM) to Localized Corrosion Modeling

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