ASTM D6486-01(2005)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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(Reapproved2005)
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 Related Coating Products
D714 Test Method for Evaluating Degree of Blistering of
1.1 This practice covers the protocol for vehicle service
Paints
exposure testing of automotive coatings. Such exposure testing
D823 Practices for Producing Films of Uniform Thickness
is valuable for the verification of the performance of automo-
of Paint, Varnish, and Related Products on Test Panels
tive coatings and correlation with laboratory test data. Vehicle
D1005 Test Method for Measurement of Dry-Film Thick-
service exposure is intended to provide short term (2 to 20
ness of Organic Coatings Using Micrometers
weeks) exposure to the stress factors associated with vehicle
D1186 Test Methods for Nondestructive Measurement of
operation. Factors included are scratch, mar, impact, stone
Dry Film Thickness of Nonmagnetic Coatings Applied to
chipping, insect impact, bird dropping, tree sap and staining,
a Ferrous Base
environmental fallout, etc.
D1400 Test Method for Nondestructive Measurement of
NOTE 1—Vehicle service exposure is not intended to provide the
DryFilmThicknessofNonconductiveCoatingsAppliedto
conditions that are needed for characterizing the long term effects of
a Nonferrous Metal Base
weathering or corrosion exposure.
D3170 Test Method for Chipping Resistance of Coatings
1.2 The exposure conditions are produced by the placement
D3359 Test Methods for Measuring Adhesion by Tape Test
of multiple test panels of automotive finishes on automotive
D5767 Test Methods for Instrumental Measurement of
test fleets that traverse a defined road course. Exposure to the
Distinctness-of-Image Gloss of Coating Surfaces
operating environment can be 20 h/day, 7 days/week allowing
2.2 U.S. Federal Standard:
for accumulation of over 100 000 miles in 10 weeks of
DOT NHTSA Reg. #49 CFR, Part 575
exposure.
3. Terminology
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
3.1 Definitions of Terms Specific to This Standard:
only.
3.1.1 blistering, n— formation in the film of dome-shaped,
1.4 This standard does not purport to address all of the
liquid- or gas-filled projections resulting from local loss of
safety concerns, if any, associated with its use. It is the
adhesion and lifting of the film from the previously applied
responsibility of the user of this standard to establish appro-
coating or the substrate.
priate safety and health practices and determine the applica-
3.1.2 chipping, n—removal of a coating, usually in small
bility of regulatory limitations prior to use.
pieces, resulting from impact by hard objects or from wear
during service.
2. Referenced Documents
3.1.3 cracking, n—formation of breaks in a film that extend
2.1 ASTM Standards:
through to the underlying surface.
D523 Test Method for Specular Gloss
3.1.4 distinctness-of-image-gloss, n—aspect of gloss char-
D609 Practice for Preparation of Cold-Rolled Steel Panels
acterized by the sharpness of images of objects produced by
for Testing Paint, Varnish, Conversion Coatings, and
reflection at a surface.
3.1.5 gloss, n—angular selectivity of reflectance, involving
surface-reflected light, responsible for the degree to which
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
reflected highlights or images of objects may be seen as
Related Coatings, Materials, and Applications and is the direct responsibility of
superimposed on a surface.
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
Current edition approved May 15, 2005. Published July 2005. Originally
approved in 1999. Last previous edition approved in 2001 as D6486 – 01. DOI:
10.1520/D6486-01R05.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Withdrawn. The last approved version of this historical standard is referenced
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM on www.astm.org.
Standards volume information, refer to the standard’s Document Summary page on AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
the ASTM website. 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6486–01 (2005)
3.1.6 staining, n— discoloration, arising from foreign ma- 8. Procedure
terials, that penetrates into the coating.
8.1 Prepare a minimum of two test panels per specimen
rack, in accordance with the coatings manufacturers specifica-
4. Significance and Use
tions, for the coatings to be evaluated. Prepare the test panels
4.1 Sincetheexposureofautomotivecoatingstothevarious
as described in Practices D609 or D823. The coating film
mechanical and chemical stresses encountered in actual opera-
thickness should be controlled in accordance with the manu-
tions, is very opportunistic, obtaining statistically significant
facturers specifications and measured in accordance with Test
data from which valid conclusions can be drawn, requires
Methods D1186, D1005 or D1400.
rigorous attention to the experimental designs and conditions
NOTE 2—Control and test coating specimens (panels) must have a large
of exposure.
enoughsurfaceareatobeabletoaccumulatesufficientoccasionsofstress,
and thus be statistically meaningful. Specimen size of 203 by 305 mm (8
5. Limitations
by 12 in.) has been found to be adequate.
5.1 Vehicle service exposure is not intended to provide the
conditions that are needed for characterizing the long term 8.2 Measure the gloss and distinctness of image (DOI) of
effects of weathering or corrosion exposure. the test and control coating panels in accordance with Test
5.2 Vehicle service exposure is not intended to provide
Methods D523 and D5767.
absolutevalues.Theperformanceofthetestcoatingsisrelative
8.3 Place the test and control coating panels on the speci-
to that of a control coating.
men racks.
8.4 Mount the specimen racks on the carrier vehicles.
6. Vehicle Te
...