Use of impedance measurements for the determination of the instant rate of metal corrosion

Epelboin, I.; Keddam, M.; Takenouti, H.

doi:10.1007/bf00615194

Cited by 289 publications

(119 citation statements)

References 12 publications

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“…The pseudo inductance is characterized by a position of impedance spectrum appearing in the fourth quadrant when the data set is plotted as real impedance component versus the negative of imaginary component. Such type of frequency responses is observed in electrochemical impedance measurements for a number of corroding systems [13,14]. This behavior arises from a number of sources [15], such as, adsorption processes.…”

Section: Introductionmentioning

confidence: 83%

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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Section: Introductionmentioning

confidence: 83%

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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“…Une augmentation significative du module d'impédance en présence de l'A.P. observée indique un effet inhibiteur notable [10].…”

Section: Capacité Différentielle De Double Coucheunclassified

Spectroscopie d'impédance électrochimique appliquée à l'étude de la corrosion

2007

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Résumé -Nous allons présenter différentes applications de la spectroscopie d'impédance électrochimique réalisées depuis 40 ans. Au début de cette longue histoire, l'emploi de signaux alternatifs était destiné à remplacer la méthode stationnaire dite de Stern et Geary, c'est-à-dire la mesure de la résistance de polarisation. Cependant, rapidement nous avons constaté que le spectre d'impédance contenait plusieurs informations sur les phénomènes se déroulant à l'interface métal | électrolyte. Ils se manifestent par une constante de temps propre à chaque processus, donc généralement distinguables par une analyse en fréquence. Après avoir présenté la différence majeure entre la méthode stationnaire et la méthode d'impédance dans l'étude de la corrosion à la fois en termes de compréhension des méca-nismes et de prévision de sa vitesse, nous aborderons plusieurs applications de cette dernière méthode : la résistance d'électrolyte, l'effet protecteur d'inhibiteurs organiques et la protection de bronzes archéologiques recouverts de patine. Key words:Faradic impedance; inhibitor; relaxation; bronze; cultural heritage Abstract -Electrochemical Impedance spectroscopy applied to the corrosion study. Various applications of the Electrochemical Impedance Spectroscopy over the last 40 years are described. At the beginning of this long history, ac signal has been used simply to determine steady state entity, the polarisation resistance to apply Stern-Geary method. However, it was remarked immediately that the impedance spectrum contains many useful information on the processes taking place at the corroding interface. These processes are revealed by a specific time-constant for each phenomenon, therefore they can be distinguished by analysing the impedance spectrum in the frequency domain. After describing the main difference between the steady-state and impedance methods for the corrosion investigation for the understanding of corrosion mechanism as well as the estimation of corrosion rate, we will show several aspects of the latter method: Electrolyte resistance, protective effect of corrosion inhibitor and the protection of bronze archaeological artefacts covered with patina.

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“…In our previous works, we have demonstrated that the electrooxidation of PGA at room temperature leads to the selective formation of Z isomers of 3-(2-propynoxy)-2-propenoic acid (Z-PPA) and propiolic acid (PA) [14,24] using an electrochemical H-cell type. Both Z-PPA and PA compounds are used as (i) polishing agents in electroplating baths to improve metal deposition, (ii) corrosion inhibitors and (iii) intermediates in organic syntheses [25]. For the scale-up of the electrosynthesis process, we have for the first time developed, manufactured, and characterised the three main parts of a PEMER configuration: a nickel based nanoparticulated anode for the electrooxidation of our model alcohol PGA, a platinum based nanoparticulated cathode for the electrochemical ORR, and the AAEM as a SPE separator.…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of a Polymer Electrolyte Membrane Electrochemical Reactor Under Alkaline Conditions − a Case Study With the Electrooxidation of Alcohols

García‐Cruz

Casado-Coterillo

Irabien

et al. 2016

Electrochimica Acta

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A novel polymer electrolyte membrane electrochemical reactor (PEMER) configuration has been employed for the direct electrooxidation of propargyl alcohol (PGA), a model primary alcohol, towards its carboxylic acid derivatives in alkaline medium. The PEMER configuration comprised of an anode and cathode based on nano-particulate Ni and Pt electrocatalysts, respectively, supported on carbonaceous substrates. The electrooxidation of PGA was performed in 1.0 M NaOH, where a cathode based on a gas diffusion electrode was manufactured for the reduction of oxygen in alkaline conditions. The performance of a novel alkaline anion-exchange membrane based on Chitosan (CS) and Poly(vinyl) alcohol (PVA) in a 50:50 composition ratio doped with a 5 wt.% of poly (4-vinylpyridine) organic ionomer cross-linked, methyl chloride quaternary salt resin (4VP) was assessed as solid polymer electrolyte. The influence of 4VP anionic ionomer loading of 7, 12 and 20 wt.% incorporated into the electrocatalytic layers was examined by SEM and cyclic voltammetry (CV) upon the optimisation of the electroactive area, the mechanical stability and cohesion of the catalytic ink onto the carbonaceous substrate for both electrodes. The performance of the 4VP/CS:PVA membrane was compared with the commercial alkaline anion-exchange membrane FAA -a membrane generally used in alkaline fuel cells-in terms of polarisation plots in alkaline conditions. Furthermore, preparative electrolyses of the electrooxidation of PGA was performed under alkaline conditions of 1 M NaOH at constant current density of 20 mA cm -2 using a PEMER configuration to provide proof of the principle of the feasibility of the electrooxidation of other alcohols in alkaline media. PGA conversion to Z isomers of 3-(2-propynoxy)-2-propenoic acid (Z-PPA) was circa 0.77, with average current efficiency of 0.32. Alkaline stability of the membranes within the PEMER configuration was finally evaluated after the electrooxidation of PGA.

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Use of impedance measurements for the determination of the instant rate of metal corrosion

Cited by 289 publications

References 12 publications

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

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

Spectroscopie d'impédance électrochimique appliquée à l'étude de la corrosion

Performance Assessment of a Polymer Electrolyte Membrane Electrochemical Reactor Under Alkaline Conditions − a Case Study With the Electrooxidation of Alcohols

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