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Determining the carbon dioxide permeability of paint films / Catarina Carneiro in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
[article]
Titre : Determining the carbon dioxide permeability of paint films Type de document : texte imprimé Auteurs : Catarina Carneiro, Auteur ; F. Oliveira, Auteur ; J. Nogueira, Auteur Année de publication : 2006 Article en page(s) : p. 323-326 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de carbone
Gaz
Mesure
Peinture -- Normalisation
Perméabilité
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : An in-house set-up was developed for determining the permeability of paint films towards carbon dioxide. The system implemented the so-called Wicke-Kallenback method, described in EN 1062-6. This method consists of a two-chamber permeation cell divided by a supported paint film. A carbon dioxide/nitrogen mixture stream (15% CO2/85% N2) is fed to the retentate chamber and a nitrogen carrier stream is fed to the permeate chamber. Carbon dioxide permeates from the retentate to the permeate chamber. The carbon dioxide flow rate is obtained from the permeate concentration and flow rate. From the carbon dioxide flow rate it is possible to calculate the paint film permeability towards this gas. The coating system is applied on a Kraft paper support sheet; the Kraft paper by itself shows negligible permeation resistance. Coatings to be considered as "surface protection systems for concrete" must comply with EN 1504-2. This standard requires that the paint film permeability have an equivalent air thickness of SD >_ 50 m. The unit developed was able to quickly determine permeabilities as low as an equivalent air thickness of SD = 1500 m. DOI : 10.1007/s11998-006-0029-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0029-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3686
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 4 (10/2006) . - p. 323-326[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005756 - Périodique Bibliothèque principale Documentaires Disponible Permeability of paint films towards chloride ion / Catarina Carneiro in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 2 (04/2006)
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Titre : Permeability of paint films towards chloride ion Type de document : texte imprimé Auteurs : Catarina Carneiro, Auteur ; A. Mendes, Auteur ; J. Nogueira, Auteur ; F. Oliveira, Auteur Année de publication : 2006 Article en page(s) : p. 159-162 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion
Ions chlorure
Matériaux cimentaires
Perméabilité
Perméation
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : An apparatus for determining the permeability of paint films towards chloride ion is described. This set-up implements the time-lag method and consists of a permeation cell made up of two chambers divided by a supported paint film. The upper chamber contains an aqueous sodium chloride solution and the lower one, water. The permeability is obtained from the conductivity history read at the lower chamber. Osmotic pressure issue is addressed and the reproducibility of the results reported. The time-lag method is not described in any standard. The requirement concerning "surface protection systems for concrete" for chloride ion permeability is not quantified in prEN 1504-2. The standard establishes that this requirement is "subject to national standards and national regulations" but when the capillary adsorption of water is lower than 0.01 kg/(m2h0.5) the diffusion of chloride ion is not to be expected. Some experimental results prove this is not correct and, in Portugal, the National Laboratory of Civil Engineering (LNEC) has proposed a threshold permeability value of 10-14 m2/sec for coatings claiming to be corrosion protective. DOI : 10.1007/s11998-006-0019-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0019-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3707
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 2 (04/2006) . - p. 159-162[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004551 - Périodique Bibliothèque principale Documentaires Disponible