Semnificație și utilizare
5.1 Metoda de testare determină acoperirea acoperirii de testare prin evaluarea vizuală a stratului pulverizat.

Notă 1 Test method D2805 describes an instrumental method for determining coverage. Apply the film to a uniform thickness (de exemplu. 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 “Determinarea puterii de acoperire a acoperirilor prin autoevaluare a acoperirilor de construcție prin pulverizare”

Etapa 1: Domeniul de aplicare
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 Values expressed in inches to pounds shall be treated as standard values. 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. Este responsabilitatea utilizatorilor acestui standard să stabilească siguranța corespunzătoare, practicile de sănătate și de mediu și pentru a determina aplicabilitatea restricțiilor de reglementare înainte de utilizare.

1.5 Acest standard internațional se bazează pe principiile de standardizare recunoscute la nivel internațional stabilite în Decizia privind principiile pentru elaborarea standardelor internaționale., Orientări și recomandări emise de Comitetul OMC privind barierele tehnice în calea comerțului (TBT).

ASTM D6762-2018 “Determinarea puterii de acoperire a acoperirilor prin autoevaluare a acoperirilor de construcție prin pulverizare”

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, lacuri, 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