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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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
30-Jun-2008
Current Stage
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ASTM D6037-96(2008) - Standard Test Methods for Dry Abrasion Mar Resistance of High Gloss Coatings
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Standards Content (Sample)

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: D6037 − 96 (Reapproved2008)
Standard Test Methods for
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Dry Abrasion Mar Resistance of High Gloss Coatings
This standard is issued under the fixed designation D6037; 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 D823 Practices for Producing Films of Uniform Thickness
of Paint, Varnish, and Related Products on Test Panels
1.1 Two test methods are included. Test Method A uses a
D1005 Test Method for Measurement of Dry-Film Thick-
device that contains an abrasive wheel. Test Method B uses a
ness of Organic Coatings Using Micrometers
device that contains a wheel that has been fitted with abrasive
D1186 Test Methods for Nondestructive Measurement of
paper. Either method can be used to evaluate the dry abrasion
Dry Film Thickness of Nonmagnetic Coatings Applied to
mar resistance of coatings applied to planar, rigid surfaces.
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a Ferrous Base (Withdrawn 2006)
Each test method provides good discrimination between highly
D1400 TestMethodforNondestructiveMeasurementofDry
mar resistant coatings.
Film Thickness of Nonconductive Coatings Applied to a
3
1.2 Mar resistance is assessed by measuring the gloss of
Nonferrous Metal Base (Withdrawn 2006)
abraded and unabraded areas. Mar resistance is directly related
D2240 Test Method for Rubber Property—Durometer Hard-
to the coating’s ability to retain gloss in abraded areas.
ness
D3924 Specification for Environment for Conditioning and
NOTE1—Themarresistancevaluesobtainedbythesetestmethodshave
no absolute significance. They should only be used to derive relative Testing Paint, Varnish, Lacquer, and Related Materials
performance rankings for test panels that have been prepared from the
D4449 Test Method for Visual Evaluation of Gloss Differ-
series of coatings that are currently being evaluated. If mar resistance
ences Between Surfaces of Similar Appearance
values are quoted between laboratories, it is essential that a common
standard be measured and that the values be compared to that standard.
3. Terminology
Even then, the values should be used with caution.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in inch-pound units are to be regarded
3.1.1 mar resistance, n—the ability of a coating to resist
as standard. The values given in parentheses are mathematical
permanent deformation or fracture, resulting from the applica-
conversions to SI units that are provided for information only
tion of a dynamic mechanical force. These test methods
and are not considered standard.
measure resistance to visible damage caused by mild abrasion.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 The coatings that are being evaluated are applied at
priate safety and health practices and determine the applica-
uniform dry film thickness to planar panels of uniform surface
bility of regulatory limitations prior to use.
texture. After drying or curing, or both, the panels are marred.
Mar resistance is assessed by measuring the coating’s gloss
2. Referenced Documents
within the abraded and unabraded areas of test panels. Mar
2
2.1 ASTM Standards:
resistance is directly related to the coating’s ability to retain
D523 Test Method for Specular Gloss
gloss in abraded areas.
D609 Practice for Preparation of Cold-Rolled Steel Panels
for Testing Paint, Varnish, Conversion Coatings, and
5. Significance and Use
Related Coating Products
5.1 Coatings, particularly the high gloss coatings used on
automobiles, boats, toys, etc., are subject to a wide variety of
1
conditions (for example, wiping, cleaning, and exposure) that
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
can mar their surface. The ability of these coatings to maintain
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
their appearance is an important product attribute. These test
Current edition approved July 1, 2008. Published July 2008. Originally approved
methods provide a way to estimate the ability of high gloss
in 1996. Last previous edition approved in 2002 as D6037 - 96 (2002). DOI:
10.1520/D6037-96R08. coatings to resist mar damage.
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this hist
...

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