New insights into the cathodic dissolution of aluminium using electrochemical methods

Tran, Mai T.T.; Tribollet, Bernard; Sutter, Éliane

doi:10.1016/j.electacta.2016.09.011

Cited by 47 publications

(37 citation statements)

References 34 publications

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“…Gas evolution often occurs simultaneously with anodic dissolution, for example during the negative difference effect (NDE) of Mg, [92][93][94][95] the cathodic dissolution of Al, 59,[96][97] and anodization of Al alloys. 98 A method of independently measuring gas evolution and thereby the stoichiometry of gas formation permits a kinetic decoupling of gas evolution, anodic dissolution, film formation, and charge transfer.…”

Section: Atomic Emission Spectroelectrochemistry Combined With Gravimmentioning

confidence: 99%

Atomic Emission Spectroelectrochemistry: Real-Time Rate Measurements of Dissolution, Corrosion, and Passivation

Ogle¹

2019

Corrosion

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Atomic emission spectroelectrochemistry (AESEC) is a relatively novel technique that gives real-time elemental dissolution rates for a material/electrolyte combination, either reacting spontaneously or with electrochemical polarization. This methodology gives direct insight into questions such as how specific elements of an alloy interact with one another, or how specific additives in a surface treatment solution will affect different alloying elements or different phases. This paper discusses AESEC instrumentation and presents the basic quantitative relationships between the electrochemical and spectroscopic measurements. A wide range of applications are used to illustrate these relationships including the surface pretreatment of aluminum alloys (etching and deoxidation) and the passivation of Fe-Cr and Ni-Cr alloys. The focus is on the use of in-line inductively coupled plasma atomic emission spectroscopy (ICP-AES), although a brief discussion of similar techniques using in-line inductively coupled mass spectroscopy (ICP-MS) is included.

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Section: Atomic Emission Spectroelectrochemistry Combined With Gravimmentioning

confidence: 99%

Atomic Emission Spectroelectrochemistry: Real-Time Rate Measurements of Dissolution, Corrosion, and Passivation

Ogle¹

2019

Corrosion

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“…Figure shows the experimental impedance, Z exp , of the columnar ZnO (real part: Z r ; imaginary part: Z i ).It has been demonstrated in the literature that, in the “classical” Bode plots (as‐recorded, without correction), the high frequency data might be obscured by the electrolyte resistance, R e , which can be misleading for data interpretation . In the present study, the R e value was obtained by graphical extrapolation of the Nyquist plot onto the real axis at high frequencies (Figs.…”

Section: Resultsmentioning

confidence: 76%

Impedance Spectroscopy Analysis of Structural Defects in Sputtered ZnO Films

et al. 2020

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The degradation of sputtered columnar ZnO layers under DC polarization was studied by using electrochemical impedance spectroscopy and electron microscopy. It was found that the structure of the as-deposited ZnO film was dense at the nanoscale. An equivalent circuit model including de Levie impedance accounted for the localized propagation of microscale cracks towards the copper substrate. This generates a capacitance (C ZnO ) that represents the crack surface area in contact with the electrolyte. C ZnO is small enough not to be obscured by the double layer capacitance at the top of the layers and increases with increasingly negative potential and time. These results were compared to nanoporous ZnO layers that behave differently and exhibit a large C ZnO . The combination of in situ EIS analysis with the ex situ structural information provided by electron microscopy proved to be an efficient methodology to characterize very different microstructures of conductive coatings.

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“…It should be noted that it is this last contribution that is analyzed when using the complex capacitance representation to determine the thickness of the oxide films formed on the surface of the electrodes. [17][18]33 The parameter determined from the fitting procedure is 0.77, and will be further discussed in the following section.…”

Section: Aluminum Electrodementioning

confidence: 99%

“…Mott-Schottky analysis), 16 thin oxide films, [17][18] or coatings for material protection. [19][20] Interpretation of impedance measurements thus requires a good understanding of the processes in the high-frequency domain, including its ohmic component.…”

Section: Introductionmentioning

confidence: 99%

From frequency dispersion to ohmic impedance: A new insight on the high-frequency impedance analysis of electrochemical systems

Gharbi

Dizon

Orazem

et al. 2019

Electrochimica Acta

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The increasing use of impedance for the characterization of an electrified interface is accompanied by the development of accurate models to analyze the results. In the present work, the concept of ohmic impedance is revisited using both numerical simulations and experimental results. The Havriliak-Negami equation is shown to provide a good representation of the high-frequency dispersion or complex ohmic impedance associated with the disk electrode geometry. An excellent fit to simulated complex ohmic impedance was found for both capacitive electrodes and for electrodes characterized by constant-phase-element behavior. The use of the Havriliak-Negami equation to account for the complex ohmic impedance was shown to extend the useful frequency range for regression of physical models to the impedance response for three experimental systems: a gold electrode in a 0.1 M sodium sulfate solution, an aluminum electrode in a 0.01 M sodium sulfate solution, and pure iron in a 0.5 M sulfuric acid solution.

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New insights into the cathodic dissolution of aluminium using electrochemical methods

Cited by 47 publications

References 34 publications

Atomic Emission Spectroelectrochemistry: Real-Time Rate Measurements of Dissolution, Corrosion, and Passivation

Atomic Emission Spectroelectrochemistry: Real-Time Rate Measurements of Dissolution, Corrosion, and Passivation

Impedance Spectroscopy Analysis of Structural Defects in Sputtered ZnO Films

From frequency dispersion to ohmic impedance: A new insight on the high-frequency impedance analysis of electrochemical systems

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