ASTM D6279-20
(Test Method)Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings
Standard Test Method for Rub Abrasion Mar Resistance of High Gloss Coatings
SIGNIFICANCE AND USE
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.
SCOPE
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 coating’s 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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Standards Content (Sample)
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.
Designation: D6279 − 20
Standard Test Method for
1
Rub Abrasion Mar Resistance of High Gloss Coatings
This standard is issued under the fixed designation D6279; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This test method covers procedures for evaluating the 2.1 ASTM Standards:
relative mar resistance of a high gloss coating applied to a flat, D16 TerminologyforPaint,RelatedCoatings,Materials,and
rigid surface. Wet rub and dry rub abrasion tests are described. Applications
To fully characterize a coating’s mar resistance, both tests D523 Test Method for Specular Gloss
should be run. D823 Practices for Producing Films of Uniform Thickness
of Paint, Coatings and Related Products on Test Panels
NOTE 1—Dry abrasion mar resistance can also be evaluated by using
D1005 Test Method for Measurement of Dry-Film Thick-
Test Methods D6037. If a very highly mar resistant coating is being
ness of Organic Coatings Using Micrometers
evaluated, Test Methods D6037 will generally provide the better perfor-
mance discrimination than the dry rub test described here. However, if the
D3924 Specification for Standard Environment for Condi-
equipment described in Test Methods D6037 is not available, the dry rub
tioning and Testing Paint, Varnish, Lacquer, and Related
test described in this test method affords a reasonable alternative. The dry
Materials
rub test is also useful for evaluating coatings that are not highly mar
D4449 Test Method for Visual Evaluation of Gloss Differ-
resistant.
ences Between Surfaces of Similar Appearance
1.2 Mar resistance is assessed by measuring the gloss of the
D6037 Test Methods for Dry Abrasion Mar Resistance of
abraded and unabraded areas. Mar resistance is directly related
High Gloss Coatings
to the coating’s ability to retain gloss in abraded areas.
D7091 Practice for Nondestructive Measurement of Dry
NOTE 2—The mar resistance values obtained by this test method have
Film Thickness of Nonmagnetic Coatings Applied to
no absolute significance. They should only be used to derive relative
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
performance rankings for test panels that have been prepared from the
ings Applied to Non-Ferrous Metals
series of coatings that are currently being evaluated. If mar resistance
values are quoted between laboratories, it is essential that a common
3. Terminology
standard be measured and that the values be compared to that standard.
Even then, the values should be used with caution.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in SI units are to be regarded as
3.1.1 mar resistance, n—the ability of a coating to resist
standard. The values given in parentheses are for information
permanent deformation or fracture, resulting from the applica-
only.
tion of a dynamic mechanical force.
3.1.1.1 Discussion—Thistestmethodmeasuresresistanceto
1.4 This standard does not purport to address all of the
visible damage caused by mild abrasion.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.2 For definitions of other terms used in this standard, refer
priate safety, health, and environmental practices and deter-
to Terminology D16.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4. Summary of Test Method
dance with internationally recognized principles on standard-
4.1 The coatings that are being evaluated are applied at
ization established in the Decision on Principles for the
uniform dry film thickness to planar panels of uniform surface
Development of International Standards, Guides and Recom-
texture. After drying or curing, or both, panels are marred by
mendations issued by the World Trade Organization Technical
the action of dry abrasion media or wet abrasion media, or
Barriers to Trade (TBT) Committee.
both, under a reciprocating weighted friction pad. Mar resis-
tance is assessed by measuring the coating’s gloss within the
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
2
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2020. Published December 2020. Originally
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6279 − 15 D6279 − 20
Standard Test Method for
1
Rub Abrasion Mar Resistance of High Gloss Coatings
This standard is issued under the fixed designation D6279; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers procedures for evaluating the relative mar resistance of a series of high gloss coatingscoating 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 series of very highly mar resistant coatingscoating 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
coating’scoating’s 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 safety, health, and healthenvironmental 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D523 Test Method for Specular Gloss
D823 Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
Current edition approved Dec. 1, 2015Dec. 1, 2020. Published January 2016December 2020. Originally approved in 1998. Last previous edition approved in 20132015
as D6279 – 03 (2013).D6279 – 15. DOI: 10.1520/D6279-15.10.1520/D6279-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6279 − 20
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D1186 Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous
3
Base (Withdrawn 2006)
D1400 Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a
3
Nonferrous Metal Base (Withdrawn 2006)
D3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials
D4449 Test Method for Visual Evaluation of Gloss Differences Between Surfaces of Similar Appearance
D6037 Test Methods for Dry Abrasion Mar Resistance of High Gloss C
...
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