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ASTM D6279-20
Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings
Přeložit název
NORMA vydána dne 1.12.2020
Informace o normě:
Označení normy: ASTM D6279-20
Datum vydání normy: 1.12.2020
Kód zboží: NS-1013139
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D6279-20 :
Keywords:
abrasion, coatings, gloss, mar, rub test, scratch,, ICS Number Code 25.220.99 (Other treatments and coatings)
Doplňující informace
| Significance and Use | ||||||||||||||
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5.1?Coatings, particularly the high gloss coatings used on automobiles, boats, toys, etc., are subject to a wide variety of conditions (for example, wiping, cleaning and exposure) during manufacture and service that can mar their surface. The ability of high gloss coatings to maintain their appearance is an important product attribute. This test method provides a way to estimate the ability of high gloss coatings to resist mar damage. |
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| 1. Scope | ||||||||||||||
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1.1?This test method covers procedures for evaluating the relative mar resistance of a high gloss coating applied to a flat, rigid surface. Wet rub and dry rub abrasion tests are described. To fully characterize a coating's mar resistance, both tests should be run. Note 1:?Dry abrasion mar resistance can also be evaluated by
using Test Methods D6037. If
a very highly mar resistant coating is being evaluated, Test
Methods D6037 will generally
provide the better performance discrimination than the dry rub test
described here. However, if the equipment described in Test Methods
D6037 is not available, the
dry rub test described in this test method affords a reasonable
alternative. The dry rub test is also useful for evaluating
coatings that are not highly mar resistant.
1.2?Mar resistance is assessed by measuring the gloss of the abraded and unabraded areas. Mar resistance is directly related to the coatings ability to retain gloss in abraded areas. Note 2:?The mar resistance values obtained by this test method
have no absolute significance. They should only be used to derive
relative performance rankings for test panels that have been
prepared from the series of coatings that are currently being
evaluated. If mar resistance values are quoted between
laboratories, it is essential that a common standard be measured
and that the values be compared to that standard. Even then, the
values should be used with caution.
1.3?The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.4?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||
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