Betekenis en gebruik
5.1 The test method determines the coverage of the test coating by visually evaluating the sprayed coating.
Opmerking 1 Test method D2805 describes an instrumental method for determining coverage. Apply the film to a uniform thickness (De bovenplaten verschillen in de lengte van hun kleine steunen, zodat er verschillende hoeken worden gevormd tussen de bovenplaten en de grondplaat. with a scraper), measure the film thickness strictly, and determine the opacity by photometry. Thus the concealment force can be determined with high precision.
5.2 Test method D6762 is not as accurate as test method D2805, but it is widely used because it is closely related to the application characteristics of paints and is simpler in terms of concept and evaluation.
ASTM D6762-2018 “Determination of Covering Power of Coatings by Self-Evaluation of Spraying Construction Coatings”
Stap 1: Domein
1.1 This test method enables quantitative visual determination of the film thickness required for complete coverage. The film thickness is considered to test the coating’s hiding power.
1.2 The method is applicable only to sprayed coatings, but the concept can also be applied to other applications.
1.3 Waarden uitgedrukt in inches tot ponden worden als standaardwaarden behandeld. The values given in brackets are mathematical conversions of SI units for reference only and are not considered as standards.
1.4 This standard is not intended to address all safety issues associated with its use. Het is de verantwoordelijkheid van de gebruikers van deze norm om de juiste veiligheid te garanderen, gezondheids- en milieupraktijken en om vóór gebruik de toepasbaarheid van wettelijke beperkingen vast te stellen.
1.5 This international standard is based on internationally recognized standardization principles established in the Decision on Principles for the Development of International Standards, Richtlijnen en aanbevelingen uitgegeven door het WTO-comité voor technische handelsbelemmeringen (TBT).
ASTM D6762-2018 “Determination of Covering Power of Coatings by Self-Evaluation of Spraying Construction Coatings”
2. Refer to the file
ASTM standard
D16 Paints, terms related to coatings, materials and applications
Practice of preparing cold rolled steel plates for testing paints, varnishes, conversion films and related coating products
D1005 Test method for dry film Thickness of organic coatings using a micrometer
D1729 Visual evaluation of diffuse reflection of opaque materials for color and chromatic aberration practice
Method for preparing D1730 coated aluminum and aluminum alloy surfaces
D2805 Test method for Covering power of coatings by reflection
D7091 Nondestructive measurement of dry film thickness for non-magnetic coatings for ferrous metals and for non-magnetic, non-conductive coatings for ferrous metals
E691 Practice of conducting interlaboratory studies to determine the accuracy of test methods