Standard Test Methods for Dry Abrasion Mar Resistance of High Gloss Coatings

SIGNIFICANCE AND USE
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) that can mar their surface. The ability of these coatings to maintain their appearance is an important product attribute. These test methods provide a way to estimate the ability of high gloss coatings to resist mar damage.
These test methods do not provide fundamental values. However they are suitable for estimating the ability of high gloss coatings to resist mar.
Since the susceptibility of coatings to marring varies widely, the number of cycles that are needed to cause “relevant” mar damage also varies. Usually, 2 to 50 cycles are sufficient.
SCOPE
1.1 Two test methods are included. Test Method A uses a device that contains an abrasive wheel. Test Method B uses a device that contains a wheel that has been fitted with abrasive paper. Either method can be used to evaluate the dry abrasion mar resistance of coatings applied to planar, rigid surfaces. Each test method provides good discrimination between highly mar resistant coatings.  
1.2 Mar resistance is assessed by measuring the gloss of abraded and unabraded areas. Mar resistance is directly related to the coating's ability to retain gloss in abraded areas.  
Note 1—The mar resistance values obtained by these test methods 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 inch-pound units are to be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use.

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Historical
Publication Date
09-Nov-1996
Current Stage
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ASTM D6037-96(2002) - Standard Test Methods for Dry Abrasion Mar Resistance of High Gloss Coatings
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 6037 – 96 (Reapproved 2002)
Standard Test Methods for
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Dry Abrasion Mar Resistance of High Gloss Coatings
This standard is issued under the fixed designation D 6037; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1186 Test Methods for Nondestructive Measurement of
Dry Film Thickness of Nonmagnetic Coatings Applied to
1.1 Two test methods are included. Test Method A uses a
2
a Ferrous Base
device that contains an abrasive wheel. Test Method B uses a
D 1400 Test Method for Nondestructive Measurement of
device that contains a wheel that has been fitted with abrasive
DryFilmThicknessofNonconductiveCoatingsAppliedto
paper. Either method can be used to evaluate the dry abrasion
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a Nonferrous Metal Base
mar resistance of coatings applied to planar, rigid surfaces.
D 2240 Test Method for Rubber Property—Durometer
Each test method provides good discrimination between highly
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Hardness
mar resistant coatings.
D 3924 Specification for Standard Environment for Condi-
1.2 Mar resistance is assessed by measuring the gloss of
tioning and Testing Paint, Varnish, Lacquer and Related
abraded and unabraded areas. Mar resistance is directly related
2
Materials
to the coating’s ability to retain gloss in abraded areas.
D 4449 Test Method for Visual Evaluation of Gloss Differ-
NOTE 1—The mar resistance values obtained by these test methods 2
ences Between Surfaces of Similar Appearance
have no absolute significance. They should only be used to derive relative
performance rankings for test panels that have been prepared from the
3. Terminology
series of coatings that are currently being evaluated. If mar resistance
3.1 Definitions of Terms Specific to This Standard:
values are quoted between laboratories, it is essential that a common
3.1.1 mar resistance—the ability of a coating to resist
standard be measured and that the values be compared to that standard.
Even then, the values should be used with caution.
permanent deformation or fracture, resulting from the applica-
tion of a dynamic mechanical force. These test methods
1.3 The values stated in inch-pound units are to be regarded
measure resistance to visible damage caused by mild abrasion.
as the standard. The values given in parentheses are for
information only.
4. Summary of Test Methods
1.4 This standard does not purport to address all of the
4.1 The coatings that are being evaluated are applied at
safety concerns, if any, associated with its use. It is the
uniform dry film thickness to planar panels of uniform surface
responsibility of the user of this standard to establish appro-
texture. After drying or curing, or both, the panels are marred.
priate safety and health practices and determine the applica-
Mar resistance is assessed by measuring the coating’s gloss
bility of regulatory limitations prior to use.
within the abraded and unabraded areas of test panels. Mar
2. Referenced Documents resistance is directly related to the coating’s ability to retain
gloss in abraded areas.
2.1 ASTM Standards:
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D 523 Test Method for Specular Gloss
5. Significance and Use
D 609 Practice for Preparation of Cold-Rolled Steel Panels
5.1 Coatings, particularly the high gloss coatings used on
for Testing Paint, Varnish, Conversion Coatings, and
2
automobiles, boats, toys, etc., are subject to a wide variety of
Related Coating Products
conditions (for example, wiping, cleaning, and exposure) that
D 823 Practices for Producing Films of Uniform Thickness
2
can mar their surface. The ability of these coatings to maintain
of Paint, Varnish, and Related Products on Test Panels
their appearance is an important product attribute. These test
D 1005 Test Method for Measurement of Dry-Film Thick-
2
methods provide a way to estimate the ability of high gloss
ness of Organic Coatings Using Micrometers
coatings to resist mar damage.
5.2 These test methods do not provide fundamental values.
1
However they are suitable for estimating the ability of high
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
gloss coatings to resist mar.
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
Current edition approved Nov. 10, 1996. Published January 1997.
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Annual Book of ASTM Standards, Vol 06.01. Annual Book of ASTM Standards, Vol 09.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 6037
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5.3 Since the susceptibility of c
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