Signification et utilisation

4.1 Contamination of paints and coatings by fungal growth (mold, mildew) is a common phenomenon, and algal growth contamination can also occur under certain conditions. It is well known that differences in environment, lumière, température, humidité, substrate pH and other factors, in addition to the paint combination, can affect the sensitivity of a given painted surface. This test method attempts to provide a way to compare and evaluate the relative properties of different coating formulations under given conditions. This does not mean that a coating that resists growth under these conditions will necessarily resist growth in real-world applications. This method is not intended to simulate or substitute for indoor or outdoor exposure to paint film or related coatings.

Note 1: The rankings for relative performance of hope are similar to those for outdoor exposure. Coatings designated for use under external conditions should be pretreated by accelerated weathering in a laboratory prior to exposure to fungi. All pre-processing needs to be detailed in the final report. Cependant, this test method should not be used as a substitute for external exposure (c'est à dire. D3456) because many other factors, only some of which are listed, can affect these results.

4.2 Familiarity with microbial technology is required. People without at least basic microbiological training should not use this test method.

ASTM D5590-2017 Standard Test Method for Determining Resistance of Paint Film and Related Coatings to Fungal Fouling by Accelerated Four-Week AGAR Plate Assay

Étape 1: Portée

1.1 The test method includes an accelerated method for determining the relative resistance of two or more paints or coatings to fungal growth.

1.2 Les valeurs exprimées en unités SI doivent être considérées comme standard. Les valeurs données entre parenthèses sont à titre indicatif uniquement.

1.3 Cette norme n'est pas destinée à répondre à tous les problèmes de sécurité, si seulement, associé à son utilisation. Il est de la responsabilité des utilisateurs de cette norme d'établir des mesures de sécurité appropriées., pratiques sanitaires et environnementales et pour déterminer l’applicabilité des restrictions réglementaires avant utilisation.

1.4 Cette norme internationale est basée sur les principes de normalisation internationalement reconnus établis dans le “Décision sur les principes pour l'élaboration de normes internationales, Lignes directrices et recommandations” publié par le Comité des obstacles techniques au commerce (OTC) de l'Organisation Mondiale du Commerce.