Application of electrochemical impedance spectroscopy (EIS) for characterizing the corrosion-protective performance of organic coatings on metals

Rammelt, U.; Reinhard, G.

doi:10.1016/0033-0655(92)87005-u

Cited by 179 publications

(67 citation statements)

References 59 publications

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“…Two-layer models were already considered by several authors [19,[23][24][25]. In the present study, the inner/outer layer distinction exists from the point of view of resistivity because Na + and Cl -ions are …”

Section: Analysis Of the Impedance Data For The Wet Coatingmentioning

confidence: 79%

Impedance analysis of the distributed resistivity of coatings in dry and wet conditions

Nguyen

Musiani

Orazem

et al. 2015

Electrochimica Acta

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A commercial coating (epoxy-polyaminoamide waterborne paint) deposited on a 2024 aluminium alloy was characterized by impedance measurements, first in dry conditions and then as a function of the immersion time in NaCl solutions (wet conditions). The behaviour of the dry coating was close to that of an ideal capacitor and could be accurately modelled with the power-law model corresponding to a constant phase element (CPE) behaviour. Upon immersion in NaCl solutions, the behaviour of the wet coating became progressively less ideal, i.e. farther from a capacitive behaviour. This result provided support to the hypothesis that an inhomogeneous uptake of the electrolyte solution was the cause of the often observed non-ideal responses of wet coatings. The experimental EIS data recorded for immersion times up to 504 hours were compared with models assuming either a power-law or an exponential variation of the coating resistivity along its thickness, respectively implying a phase angle independent of frequency or slightly dependent on it.

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Section: Analysis Of the Impedance Data For The Wet Coatingmentioning

confidence: 79%

Impedance analysis of the distributed resistivity of coatings in dry and wet conditions

Nguyen

Musiani

Orazem

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…Low Z real value could be brought about by very high capacitance and/or very low resistance of the coating [46]. Large value of the capacitance has been related to the high extent at which water has penetrated the coating [47]. In the case of Bode plots, the value of Z real at the lowest frequency also represents the corrosion resistance.…”

Section: Electrochemical Impedance Measurements Electrochemical Impedmentioning

confidence: 99%

Advanced anticorrosive coatings prepared from electroactive polyimide/graphene nanocomposites with synergistic effects of redox catalytic capability and gas barrier properties

Chang¹,

Hsu²,

Lu³

et al. 2014

Express Polym. Lett.

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“…A low Z real value is generally due to very high capacitance and/or very low resistance of the coating [45]. A large capacitance has been related to a high extent of water penetration into the coating [46]. In the Bode plots, the value of Z real at the lowest frequency also represents the corrosion resistance.…”

Section: Electrochemical Impedancementioning

confidence: 99%

The effect of varying carboxylic-group content in reduced graphene oxides on the anticorrosive properties of PMMA/reduced graphene oxide composites

Chang¹,

Ji²,

Li³

et al. 2014

Express Polym. Lett.

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Abstract.We present comparative studies on the effect of varying the carboxylic-group content of thermally reduced graphene oxides (TRGs) on the anticorrosive properties of as-prepared poly(methyl methacrylate) (PMMA)/TRG composite (PTC) coatings. TRGs were formed from graphene oxide (GO) by thermal exfoliation. The as-prepared TRGs were then characterized using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Subsequently, the PTC materials were prepared via a UV-curing process and then characterized using FTIR spectroscopy and transmission electron microscopy (TEM). PTC coatings containing TRGs with a higher carboxylic-group content exhibited better corrosion protection of a cold-rolled steel electrode that those with a lower carboxylic-group content. This is because the well-dispersed TRG with a higher carboxylic-group content embedded in the PMMA matrix effectively enhances the oxygen barrier properties of the PTC. This conclusion was supported by gas permeability analysis.

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Application of electrochemical impedance spectroscopy (EIS) for characterizing the corrosion-protective performance of organic coatings on metals

Cited by 179 publications

References 59 publications

Impedance analysis of the distributed resistivity of coatings in dry and wet conditions

Impedance analysis of the distributed resistivity of coatings in dry and wet conditions

Advanced anticorrosive coatings prepared from electroactive polyimide/graphene nanocomposites with synergistic effects of redox catalytic capability and gas barrier properties

The effect of varying carboxylic-group content in reduced graphene oxides on the anticorrosive properties of PMMA/reduced graphene oxide composites

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