Significato e scopo
4.1 This guide provides a useful summary of procedures for selecting and using test coating powders and powder coatings. It is applicable to thermoplastic and thermoset coatings unless otherwise stated. By design, this guide is not intended to address test methods or procedures developed specifically for the functional powder coatings market, namely those coating powders used in pipes or reinforcing rebar (rebar). Information on current test procedures for coating powders and powder coatings for pipes and reinforced rebar can be obtained through their respective ASTM subcommittees A01.05 and D01.48.

4.2 The choice of the methodology to follow and the interpretation of the results needs to depend on the experience and requirements of each case, as well as the agreement between the buyer and the seller. It should be noted that many of the methods used to characterize paint powders, such as gel time (Section 16) and tilt flow (Section 17), are primarily used for the relative comparison of two paint powders, rather than giving test values that can be interpreted as good or bad. The interpretation of the test results will depend on the specific application in question and often also on the chemical nature of the coating powder used.

ASTM D3451-06-2017 Test di rivestimenti in polvere e rivestimenti in polvere

Ambito di applicazione
1.1 This guide covers the selection and use of procedures for testing paint powders and powder coatings. Tavolo 1 elenca i metodi di test inclusi. If more than one test method is listed for the same feature, no attempt is made to show that one method is superior to the other. The choice of the method to follow needs to depend on the experience and requirements of each case, as well as the agreement between buyer and seller.

1.2 This guide also refers to methods developed specifically for the paint powder industry by the Powder Coating Association (PCI) and the International Standards Organization (ISO).

1.3 This guide describes the testing of paint powders by electrostatic spraying, fluidized bed, or any other applicable method.

ASTM D3451-06-2017 Test di rivestimenti in polvere e rivestimenti in polvere

1.4 I valori espressi in unità SI devono essere considerati valori standard. Altre unità di misura non sono incluse in questo standard.

1.5 Questo standard non è destinato ad affrontare tutti i problemi di sicurezza, se presente, legati al suo utilizzo. È responsabilità degli utenti di questo standard stabilire adeguate pratiche di sicurezza e salute e determinare l'applicabilità delle restrizioni normative prima dell'uso.

1.6 La presente norma internazionale è stata sviluppata in conformità con i principi di standardizzazione riconosciuti a livello internazionale stabiliti nella Decisione sui principi per lo sviluppo di norme internazionali, Linee guida e raccomandazioni emesse dal Comitato sugli ostacoli tecnici al commercio dell'Organizzazione mondiale del commercio.