Le présent document fait partie d'une série de normes traitant de l'échantillonnage et des essais de peintures, vernis et produits assimilés. Il prescrit une méthode pour la détermination de la tendance d'un mélange de deux différentes peintures en poudre à détériorer la qualité de surface du revêtement final. Les résultats dépendent des caractéristiques suivantes des peintures en poudre : a) leur réactivité chimique ; b) leur composition chimique ; c) leurs propriétés de fusion. La détérioration de l'aspect, la nature et l'étendue de cette détérioration dépendront largement du rapport de mélange des poudres.
<p>This document specifies a visual method to determine the deterioration of surface quality of the final coating when mixing two different coating powders. The surface quality will depend on the following characteristics of the coating powders:</p> <p>a) the chemical reactivity;</p> <p>b) the chemical composition;</p> <p>c) the melt properties.</p> <p>The onset of the incompatibility in appearance, its nature and its extent will depend greatly on the ratio in which the powders are mixed. The nature of the incompatibility in surface appearance can manifest itself in various ways, described in Clause 8.</p> <p>This test is useful in predicting the possibility of incompatibility arising from mixing different powders both during the manufacturing process and during the application of the coating powder.</p> <p>This document concerns only changes in visual aspects of the coating. The mixture series can also be used for testing properties such as mechanical properties, chemical properties, corrosive properties and resistance against UV radiation. Further properties can be agreed between interested parties.</p>
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