| Titre : |
Glass flake in barrier coatings : Thinner grades of glass flake, as an alternative to conventional fillers, are discussed in this paper |
| Type de document : |
texte imprimé |
| Auteurs : |
Victoria Mirko, Auteur ; Simon Brigham, Auteur ; Charles Watkinson, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 30-33 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Charges (matériaux)
Décollement cathodique (revêtement)
Epoxydes
Essais (technologie)
Matériaux -- Propriétés barrières
Paillettes
Polyesters
Résistance chimique
Revêtements protecteurs
Transmission de vapeur d'humidité
Verre
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Glass flakes outperform traditional platelet-like fillers in corrosive and chemically aggressive environments. One of the main areas of glass flake application is barrier coatings where glass flakes are recommended for use as a replacement for MIO and other platelet-like fillers. Thinner grades of glass flake are feasible for application as an alternative to thicker grades. Moisture vapour transmission test and cathodic disbondment test results are used for the characterisation of coating performance.
Early glass flakes and coatings were somewhat crude. The flakes being hugely variable in thickness and plate size, the coatings being simple trowel or brush applied materials basically designed as a glass fibre composite layer but with glass flake substituting for fibres.
A lot of research has been done into the comparison of glass flake to alternative fillers in the 1980-90s but this was done when commercially available glass flake was still crude. Since then, the technology has evolved and in this article the authors analysed the feasibility of using thinner flake in barrier coatings. |
| Note de contenu : |
- Morphology and chemical resistance
- Sacrificial and barrier protection
- Glass flake in barrier coatings
- Experimental
- Application areas
- Formulating with glass flake
- FIGURES : 1. SEM micrograph of 5µm glass flake produced by bubble method and SEM micrograph of 5µm glassflake Ltd glass flake produced by ITS rotary method - 2. MVT test on a bis-A epoxy with 2% wt granular filler and 2% wt glass flake - 3. SEM micrographs of cross section of an epoxy mastic coating with 10% wt aluminium pigments and with 10% wt glass flakes - 4. Cathodic disbondment radius of an epoxy mastic coating, with various concentrations of aluminium and glass pigments, measured over the perior of time (years) - 5. Cathodic disbondment of MIO and glass flake filled epoxy resin - 6. The results of a high temperature accelerated cathodic disbondment test carried out at 180°C with two different grades of glass flake - 7. MVT test for 5%m and 2.2µm glass flake filled polyester
- TABLES : 1. MVT tested in acordance with ASTM D1653 - 2. Cathodic disbondment tested to BS3900 - 3. Estimated applied cost of offshore coating systems - 4. Application areas for glass flake filled barrier coatings |
| En ligne : |
https://drive.google.com/file/d/16HeVsyWa1g_dfI-b9rF8Xhy8Ov-Y3R_V/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28772 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 207, N° 4632 (06/2017) . - p. 30-33
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