ASTM D6762 2018 “Pagpapasiya ng pagtakpan ang kapangyarihan ng mga coatings sa pamamagitan ng pagsusuri sa sarili ng pag spray ng mga coating ng konstruksiyon”
Kahulugan at paggamit
5.1 Ang pamamaraan ng pagsubok ay tumutukoy sa saklaw ng patong ng pagsubok sa pamamagitan ng biswal na pagsusuri sa sprayed coating.
Tala 1 Test method D2805 describes an instrumental method for determining coverage. Apply the film to a uniform thickness (e.g. 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 “Pagpapasiya ng pagtakpan ang kapangyarihan ng mga coatings sa pamamagitan ng pagsusuri sa sarili ng pag spray ng mga coating ng konstruksiyon”
Hakbang 1: Saklaw
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. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.
1.5 Ang internasyonal na pamantayang ito ay batay sa mga prinsipyo ng standardisasyon na kinikilala ng internasyonal na itinatag sa Desisyon sa mga Prinsipyo para sa Pag unlad ng mga Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon na inilabas ng WTO Committee on Technical Barriers to Trade (TBT).
ASTM D6762 2018 “Pagpapasiya ng pagtakpan ang kapangyarihan ng mga coatings sa pamamagitan ng pagsusuri sa sarili ng pag spray ng mga coating ng konstruksiyon”
2. Sumangguni sa file
Pamantayan ng ASTM
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