Use of Electrochemical Impedance Spectroscopy (EIS) for the Evaluation of Electrocoatings Performances

Olivier, Marie‐Georges; Poelman, M.

doi:10.5772/33844

Cited by 27 publications

(25 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to some authors, the coating capacitance can be associated with water uptake or entry of the electrolyte into the coating [39,40]. Figure The other parameter that can be evaluated is Rpore which is related to the existence or absence of ion-conducting paths/pores in the coating and an indication of the quality of the coating.…”

Section: Corrosion Performancementioning

confidence: 99%

Influence of silica nanoparticles on corrosion resistance of sol-gel based coatings on mild steel

Mora

Naik

Paul

et al. 2017

Surface and Coatings Technology

View full text Add to dashboard Cite

Abstract:For this study, unfunctionalised and functionalised nanoparticles of silica (SiO2) were incorporated into a sol-gel based matrix in an effort to provide more effective corrosion protection on a mild steel substrate. Tests such as atomic force microscopy (AFM) and white light interferometry (WLI) were carried out to characterise coating microstructure and properties. Corrosion protection and coating durability was investigated using differe nt methods which included electrochemical impedance spectroscopy (EIS) and accelerated salt spray testing to simulate a marine environment. Electrochemical test results as well as results after exposure in the neutral salt spray test indicated that the addition of silica nanoparticles led to an improvement in corrosion resistance of the coating matrix. The most effective performance was observed when the nanoparticles were functiona lised. Nanoparticle functionalisation helped to avoid agglomeration during incorporation leading to a more unifo r m nanoparticle distribution within the coating formulation and an improvement of the coating's ability to protect against corrosion.2 Highlights:-The influence of silica (SiO2) nanoparticle incorporation in a sol-gel based coating was studied -SiO2 particle surface treatment improved coating homogeneity and prevented cracking propagation -Corrosion resistance improved with functionalised SiO2 nanoparticles

show abstract

Section: Corrosion Performancementioning

confidence: 99%

Influence of silica nanoparticles on corrosion resistance of sol-gel based coatings on mild steel

Mora

Naik

Paul

et al. 2017

Surface and Coatings Technology

View full text Add to dashboard Cite

show abstract

“…(16) The impedance spectra for the Al-plated substrates were modeled with the simple Randles circuit for a corroding interface shown in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Resistance of Aluminum Films Electroplated on Steel from Chloroaluminate Ionic Liquids Containing Toluene as a Co-Solvent

Chou

Hussey

2014

ECS Trans.

View full text Add to dashboard Cite

Dense and adhesive pure aluminum layers were electroplated on Cu and mild carbon steel plates from the Lewis acidic aluminum chloride-1-ethyl-3-methylimidazolium chloride [60 mole percent (m/o) AlCl3] ionic liquid by using current-controlled DC methods. The influence of the current density on the surface morphology and grain size of the electrodeposited Al was investigated by optical microscopy. The corrosion resistance of Al-coated steel was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization measurements for deposits prepared with and without toluene as a co-solvent. Both deposition current density and deposit thickness were crucial factors affecting the structure, integrity, and corrosion resistance of electrodeposited Al layers on steel substrates. Aluminum films prepared in the ionic liquid containing toluene exhibited better overall durability, brightness, and practical corrosion resistance than films prepared from the neat ionic liquid. IntroductionAluminum is a widely used material for corrosion resistant coatings. From a thermodynamic perspective, it is a very active metal. However, its excellent corrosion resistance stems from the formation of a robust, self-healing ~50 nm thick barrier oxide film, which is formed spontaneously upon exposure to air at ambient temperature. Unfortunately, aluminum cannot be plated from aqueous solutions because hydrogen is evolved before most Al(III) species are reduced to Al. Among the many nonaqueous solvent systems that have been used to plate Al are those based on room-temperature haloaluminate ionic liquids (ILs).The first system, aluminum chloride-1-ethylpyridinium bromide, was reported in 1951. (1) Improved ionic liquids were obtained by replacing the pyridinium bromide salt component first with 1-alkylpyridinium chloride (2) and eventually the now ubiquitous 1,3-dialkylimidazolium chloride salts. (3) Although slow to reach commercial development (BASF ® SE), plating baths based on the latter IL offer numerous safety and convenience advantages compared to those based on pyrophoric organoaluminum compounds. (4) It was recognized during the inception of Al plating baths based on haloaluminate ionic liquids that the addition of an aromatic co-solvent, e.g., benzene or toluene, leads to brighter, more adherent coatings. (5, 6) Several research groups have examined or reviewed the electrodeposition of Al from room-temperature chloroaluminates containing at least one of these aromatic solvents. (7-12) The addition of co-solvents appears to 10.1149/06404.0549ecst ©The Electrochemical Society ECS Transactions, 64 (4) 549-561 (2014) 549 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.255.6.125 Downloaded on 2015-06-04 to IPimprove the appearance of Al coatings prepared in chloroaluminate ILs, but there is little information about the effects of bath co-solvents on the corrosion resistance of these platings. In this work, we report the direct current plating of...

show abstract

“…This reduction in Rp with time may be caused by an increase in Ap, which is related to the number of filled pores or an increase of their area in case of delamination [17,67].…”

Section: Equivalent Circuit Of Coatingmentioning

confidence: 99%

“…Dielectric or chemical changes to the metal/coating interface are time dependent as the ingress of aqueous solutions take place which can be represented on a Bode plot with a slope of magnitude slightly less than 1 [17,65]. Most researchers measure EIS spectra by starting at the high frequency and progress toward low frequency with the objective of measuring the maximum number of data points before the system changes, since measurements at low frequencies take much longer or are not always possible [17,62,67].…”

Section: Barrier Property Detection Of Coating Deteriorationmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of External Coating Performance on Buried Pipelines in the Oil and Gas Industry

Alrudayni¹

View full text Add to dashboard Cite

Use of Electrochemical Impedance Spectroscopy (EIS) for the Evaluation of Electrocoatings Performances

Cited by 27 publications

References 36 publications

Influence of silica nanoparticles on corrosion resistance of sol-gel based coatings on mild steel

Influence of silica nanoparticles on corrosion resistance of sol-gel based coatings on mild steel

Corrosion Resistance of Aluminum Films Electroplated on Steel from Chloroaluminate Ionic Liquids Containing Toluene as a Co-Solvent

Evaluation of External Coating Performance on Buried Pipelines in the Oil and Gas Industry

Contact Info

Product

Resources

About