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ASTM D6486-01(2011)

(Practice)

Standard Practice for Short Term Vehicle Service Exposure of Automotive Coatings

Standard Practice for Short Term Vehicle Service Exposure of Automotive Coatings

SIGNIFICANCE AND USE
Since the exposure of automotive coatings to the various mechanical and chemical stresses encountered in actual operations, is very opportunistic, obtaining statistically significant data from which valid conclusions can be drawn, requires rigorous attention to the experimental designs and conditions of exposure.
SCOPE
1.1 This practice covers the protocol for vehicle service exposure testing of automotive coatings. Such exposure testing is valuable for the verification of the performance of automotive coatings and correlation with laboratory test data. Vehicle service exposure is intended to provide short term (2 to 20 weeks) exposure to the stress factors associated with vehicle operation. Factors included are scratch, mar, impact, stone chipping, insect impact, bird dropping, tree sap and staining, environmental fallout, etc.
Note 1—Vehicle service exposure is not intended to provide the conditions that are needed for characterizing the long term effects of weathering or corrosion exposure.
1.2 The exposure conditions are produced by the placement of multiple test panels of automotive finishes on automotive test fleets that traverse a defined road course. Exposure to the operating environment can be 20 h/day, 7 days/week allowing for accumulation of over 100 000 miles in 10 weeks of exposure.
1.3 The values stated in SI 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.

General Information

Status
Historical
Publication Date
31-May-2011
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.55 - Factory Applied Coatings on Preformed Products
Current Stage
Ref Project

Relations

Replaces
ASTM D6486-01(2005) - Standard Practice for Short Term Vehicle Service Exposure of Automotive Coatings
Effective Date
01-Jun-2011

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ASTM D6486-01(2011) - Standard Practice for Short Term Vehicle Service Exposure of Automotive CoatingsASTM D6486-01(2011) - Standard Practice for Short Term Vehicle Service Exposure of Automotive Coatings
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ASTM D6486-01(2011) - Standard Practice for Short Term Vehicle Service Exposure of Automotive 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: D6486 − 01 (Reapproved 2011)
Standard Practice for
Short Term Vehicle Service Exposure of Automotive
Coatings
This standard is issued under the fixed designation D6486; 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 D609 Practice for Preparation of Cold-Rolled Steel Panels
for Testing Paint, Varnish, Conversion Coatings, and
1.1 This practice covers the protocol for vehicle service
Related Coating Products
exposure testing of automotive coatings. Such exposure testing
D714 Test Method for Evaluating Degree of Blistering of
is valuable for the verification of the performance of automo-
Paints
tive coatings and correlation with laboratory test data. Vehicle
D823 Practices for Producing Films of Uniform Thickness
service exposure is intended to provide short term (2 to 20
of Paint, Varnish, and Related Products on Test Panels
weeks) exposure to the stress factors associated with vehicle
D1005 Test Method for Measurement of Dry-Film Thick-
operation. Factors included are scratch, mar, impact, stone
ness of Organic Coatings Using Micrometers
chipping, insect impact, bird dropping, tree sap and staining,
D1186 Test Methods for Nondestructive Measurement of
environmental fallout, etc.
Dry Film Thickness of Nonmagnetic Coatings Applied to
NOTE 1—Vehicle service exposure is not intended to provide the
a Ferrous Base (Withdrawn 2006)
conditions that are needed for characterizing the long term effects of
D1400 TestMethodforNondestructiveMeasurementofDry
weathering or corrosion exposure.
Film Thickness of Nonconductive Coatings Applied to a
1.2 The exposure conditions are produced by the placement
Nonferrous Metal Base (Withdrawn 2006)
of multiple test panels of automotive finishes on automotive
D3170 Test Method for Chipping Resistance of Coatings
test fleets that traverse a defined road course. Exposure to the
D3359 Test Methods for Measuring Adhesion by Tape Test
operating environment can be 20 h/day, 7 days/week allowing
D5767 Test Methods for Instrumental Measurement of
for accumulation of over 100 000 miles in 10 weeks of
Distinctness-of-Image Gloss of Coating Surfaces
exposure.
2.2 U.S. Federal Standard:
1.3 The values stated in SI units are to be regarded as the
DOT NHTSA Reg. #49 CFR Part 575
standard. The values given in parentheses are for information
3. Terminology
only.
1.4 This standard does not purport to address all of the 3.1 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the 3.1.1 blistering, n—formation in the film of dome-shaped,
responsibility of the user of this standard to establish appro- liquid- or gas-filled projections resulting from local loss of
priate safety and health practices and determine the applica- adhesion and lifting of the film from the previously applied
bility of regulatory limitations prior to use. coating or the substrate.
3.1.2 chipping, n—removal of a coating, usually in small
2. Referenced Documents
pieces, resulting from impact by hard objects or from wear
during service.
2.1 ASTM Standards:
D523 Test Method for Specular Gloss
3.1.3 cracking, n—formation of breaks in a film that extend
through to the underlying surface.
3.1.4 distinctness-of-image-gloss, n—aspect of gloss char-
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
acterized by the sharpness of images of objects produced by
Related Coatings, Materials, and Applications and is the direct responsibility of
reflection at a surface.
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
Current edition approved June 1, 2011. Published June 2011. Originally
approved in 1999. Last previous edition approved in 2005 as D6486 – 01 (2005).
DOI: 10.1520/D6486-01R11. The last approved version of this historical standard is referenced on
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.astm.org.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6486 − 01 (2011)
3.1.5 gloss, n—angular selectivity of reflectance, involving 7.2 The fleet operating environment should be defined to
surface-reflected light, responsible for the degree to which optimize the stress factors of interest. Examples are; gravel/
reflected highlights or images of objects may be seen as unpaved road segments to evaluate stone chipping, mechanical
superimposed on a surface. car washing after dust road travel to evaluate mar resistance,
operation during insect season to evaluate insect impact, etc.
3.1.6 staining, n—discoloration, arising from foreign
materials, that penetrates into the coating.
8. Procedure
4. Significance and Use
8.1 Prepare a minimum of two test panels per specimen
4.1 Sincetheexposureofautomotivecoatingstothevarious
rack, in accordance with the coatings manufacturers
mechanical and chemical stresses encountered in actual
specifications, for the coatings to be evaluated. Prepare the test
operations, is very opportunistic, obtaining statistically signifi-
panels as described in Practices D609 or D823. The coating
cant data from which valid conclusions can be drawn, requires
film thickness should be controlled in accordance with the
rigorous attention to the experimental designs and conditions
manufacturers specifications and measured in accordance with
of exposure.
Test Methods D1186, D1005 or D1400.
NOTE 2—Control and test coating specimens (panels) must have a large
5. Limitations
enoughsurfaceareatobeabletoaccumulatesufficientoccasionsofstress,
5.1 Vehicle service exposure is not intended to provide the
and thus be statistically meaningful. Specimen size of 203 by 305 mm (8
by 12 in.) has been found to be adequate.
conditions that are needed for characterizing the long term
effects of weathering or corrosion exposure.
8.2 Measure the gloss and distinctness of image (DOI) of
the test and control coating panels in accordance with Test
5.2 Vehicle service exposure is not
...

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SCOPE
1.1 This test method covers a procedure for rapidly deforming by impact a coating film and its substrate and for evaluating the effect of such deformation.  
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