Relevance of the boil test as a short-term test / Axel Blecher in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 9, N° 3 (2016)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 9, N° 3 (2016) . - p. 12-17 Titre : Relevance of the boil test as a short-term test Type de document : texte imprimé Auteurs : Axel Blecher, Auteur Année de publication : 2016 Article en page(s) : p. 12-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Revêtements poudre:Peinture poudre Test d'ébullition Index. décimale : 667.9 Revêtements et enduits Résumé : For years, the boil test was used in the powder coating industry as a simple test to check the adhesion of paints on pre-anodised surfaces. However, in 2011, GSB International critically examined and ultimately stopped using the test for several reasons explained in this article. Note de contenu : - Reasons for including the boil test in the quality and test specifications - Effect on the powder coating properties due to paint modificaiton - Pre-anodising and the boil test - FIGURES : 1. Characteristics of powder coating systems - 2. Colour changes ΔL comparable in the moisture exposure (water marks) test and the constant climate condensation test. (CCC) - 3. Correlation between DL in constant climate condensation test and GSB moisture exposure test - 4. Cross-cut test with adhesive tape removal after 2h boil test - 5. Cross-cut test with adhesive tape removal after 1000h AASS - 6. Effect of the layer thickness on the coating adhesion in the cross-cut test - 7. Effect of post rinsing on the coating adhesion in the cross-cut test - 8. Water absorption of pre-anodised and coated sheets Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27747 [article]

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What security is offered in practice by standardised test procedures ? / Hans-Jürgen Alfort in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 10, N° 3 (2017)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 10, N° 3 (2017) . - p. 32-38 Titre : What security is offered in practice by standardised test procedures ? Type de document : texte imprimé Auteurs : Hans-Jürgen Alfort, Auteur ; Axel Blecher, Auteur Année de publication : 2017 Article en page(s) : p. 32-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse électrochimique Analyse thermique Corrosion Essais accélérés (technologie) Essais de brouillard salin Evaluation Résistance à l'humidité Résistance chimique Revêtements -- Corrosion:Peinture -- Corrosion Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : Test methods for the continuous production control in the powder coating must deliver results as quickly as possible. In the following article important tests are rated for process monitoring in terms of significance to the user. Note de contenu : - THE CURING PROCESS - THE DSC ANALYSIS - MECHANICAL TESTING - NATURAL WEATHERING - FLORIDA/ ACCELERATED WEATHERING - CORROSION TESTS : Alkali resistance - Condensation-water atmosphere / Resistance to moisture - Salt spray test - Filiform corrosion - ELECTROCHEMICAL MEASUREMENTS - TABLES : 1. GSB QR AL 631 modification from 1978 to 2016 - 2. Calculating the degree of crosslinking /1/degree of crosslinking (%) = (Tg film - Tg powder)/(Tg film fully crosslinked - Tg powder) *100 - FIGURES : 1. The crosslinking reaction requires a system-dependent energy quantity. The energy input is in relation to temperature and time - 2. Curing curves for different material thicknesses - 3. Process of film formation - 4. Determination of the degree of crosslinking with DSC - 4. Determination of the degree of crosslinking with DSC - 5. Radiation intensity development in Florida from 1993 to 2013 - 6. Guideline values of GSB International for total UV radiation - 7. QUV-B test specifications and GSB requirements - 8. Test results RAL 9001 - 9. Loss of gloss for GSB master and premium systems after 5 years florida - 10K. Test duration of different corrosion tests - 11. Evaluation of corrosion tests regarding correlation, relevance, acceleration and precision - 12. Evaluation of the acidic acid salt spray test (AASS) regarding correlation, relevance, acceleration and precision - 13. Evaluation of the filiform corrosion test (FFK) regarding correlation, relevance, acceleration and precision - 14. Comparison of results according to 1000 hours FFK test (DIN EN 3665 : 1997) with 10 years of natural exposure in the maritime industrial climate of Hoek van Holland Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29452 [article]

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