Estudio de la entrada de agua en pinturas de base agua: Comparación entre pintura aplicada y libre

C. Pérez; A. Collazo; M. Izquierdo; X. R. Nóvoa; P. Merino

doi:10.3989/revmetalm.1998.v34.iExtra.723

Water uptake in a water-borne paint: a supported and free film comparison

Authors

C. Pérez Dpto. de Ingeniería de Materiales, Mecánica Aplicada y Construcción. E.T.S. Ing. Ind. y de Minas, Univ. de Vigo
A. Collazo Dpto. de Ingeniería de Materiales, Mecánica Aplicada y Construcción. E.T.S. Ing. Ind. y de Minas, Univ. de Vigo
M. Izquierdo Dpto. de Ingeniería Química. E.T.S. Ing. Ind. y de Minas, Univ. de Vigo
X. R. Nóvoa Dpto. de Ingeniería Química. E.T.S. Ing. Ind. y de Minas, Univ. de Vigo
P. Merino Dpto. de Ingeniería de Materiales, Mecánica Aplicada y Construcción. E.T.S. Ing. Ind. y de Minas, Univ. de Vigo

DOI:

https://doi.org/10.3989/revmetalm.1998.v34.iExtra.723

Keywords:

Water uptake, Water-borne paint, Diffusion coefficient, Impedance spectroscopy, Dielectric constant

Abstract

Paints behave as barriers to protect the metallic substrate against corrosion. In the present work, the water uptake in an acrylic water-borne paint was studied under two different conditions: supported and free film, immersed in a sodium chloride 5 % solution. Using the impedance spectroscopy (IS) technique, a sharp increase in the film capacitance was observed, which is related to the volume fraction of water taken into the film by using the Brasher-Kinsbury equation. The results suggested that there was no big differences between both situations. The calculated apparent diffusion coefficient suggests that the difference between both tested situations is of minor importance.

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Published

1998-05-30

How to Cite

Pérez, C., Collazo, A., Izquierdo, M., Nóvoa, X. R., & Merino, P. (1998). Water uptake in a water-borne paint: a supported and free film comparison. Revista De Metalurgia, 34(Extra), 122–126. https://doi.org/10.3989/revmetalm.1998.v34.iExtra.723

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Issue

Vol. 34 No. Extra (1998)

Section

Articles

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