Signification et objectif
4.1 The procedures described in this practice are intended to help evaluate the performance of house and decorative paints on new, previously unpainted wood.

4.2 Due to differences in solar radiation, temps humide, température, polluants, et d'autres facteurs, the relative durability of paint during outdoor exposure may vary considerably depending on the location of the exposure. Donc, it cannot be assumed that the results of a single exposure at a single location will help determine the relative durability of different locations. Exposure is recommended at multiple sites with different climates that represent a wide range of expected service conditions.

4.2.1 Due to annual climate variability, the results of a single exposure test cannot be used to predict the absolute rate of material degradation. It takes several years of repeated exposure to obtain an “moyenne” test result for a given location.

4.2.2 Solar radiation varies greatly with the time of year. This can lead to large differences in apparent degradation rates for many coatings. It is not recommended to compare results for materials exposed for a short period of time (less than one year) unless the materials were exposed at the same location at the same time.

4.2.3 It is recommended to conduct at least three repeated tests for each material. Based on the parameters of the known material, a statistical estimate of the number of required repetitions can be found in Practice E122.

4.3 The Meaning and Uses section in Practice G7 addresses many of the variables to be considered in external exposure testing.

ASTMD 1006-2021 “Test d'exposition extérieure pour la peinture sur bois”

Champ d'application
1.1 This practice covers the procedures to be followed for direct exposure of previously unpainted wood and wood composites to house and decorative paints. When the sponsor actual exposure of the aging test is carried out by a separate agency, the specific conditions for testing and controlling the exposure of the specimen should be clearly defined and mutually agreed upon by the parties.

1.2 This standard covers sample preparation, including the application of test coatings to wood substrates.

1.3 Les valeurs exprimées en unités SI ou en unités pouces-livres doivent être traitées séparément comme valeurs standard.. Les valeurs spécifiées dans chaque système ne sont pas nécessairement les mêmes; Donc, pour assurer le respect des normes, chaque système doit être utilisé indépendamment l'un de l'autre et les valeurs des deux systèmes ne doivent pas être combinées.

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

1.5 La présente Norme internationale a été élaborée conformément aux principes de normalisation internationalement reconnus établis dans la Décision sur les principes pour l'élaboration de normes internationales., Lignes directrices et recommandations émises par le Comité des obstacles techniques au commerce de l'Organisation mondiale du commerce.