The Structure of Epoxy Coatings Studied with Impedance Measurements

Geenen, F.M.; Lenderink, H.J.W.; Wit, J.H.W. de

doi:10.4028/www.scientific.net/msf.111-112.231

Cited by 2 publications

(1 citation statement)

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“…As the dielectric constant of the organic coating is small compared with that of water [12], the penetration of water will induce a relatively large change in the capacitance of the paint film and, as a result, the water uptake may be monitored accurately by measuring the change of C with the immersion time. Figure I shows the dependence of the capacitance of the paint film with the immersion time during the water penetration process.…”

Section: Water Uptakementioning

confidence: 99%

Determination of the adhesion properties of an alkyd pigmented coating by electrochemical impedance spectroscopy

Gonzalez

Rosca

1999

Journal of Adhesion Science and Technology

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Abstract�One of the most modern methods of characterizing the electrical properties of coatings is by electrochemical impedance spectroscopy (EIS). EIS can provide useful information about the transport of water and corrosive species through a coating. In this study, impedance measurements were performed in different frequency ranges at open circuit potential for an alkyd coating with TiO2 as a mineral pigment in 3% NaCl. The most probable impedance equivalent circuit method (MPI) was considered for data analysis. The interpretation of the impedance spectra permitted the determination of water permeation, the formation of blisters, swelling of the coating, and the loss of adhesion.

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Section: Water Uptakementioning

confidence: 99%