Standard Practice for Short Term Vehicle Service Exposure of Automotive Coatings

SIGNIFICANCE AND USE
4.1 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, 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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Publication Date
30-Jun-2023
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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: D6486 − 23
Standard Practice for
Short Term Vehicle Service Exposure of Automotive
1
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 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This practice covers the protocol for vehicle service
D523 Test Method for Specular Gloss
exposure testing of automotive coatings. Such exposure testing
D609 Practice for Preparation of Cold-Rolled Steel Panels
is valuable for the verification of the performance of automo-
for Testing Paint, Varnish, Conversion Coatings, and
tive coatings and correlation with laboratory test data. Vehicle
Related Coating Products
service exposure is intended to provide short term (2 to 20
D714 Test Method for Evaluating Degree of Blistering of
weeks) exposure to the stress factors associated with vehicle
Paints
operation. Factors included are scratch, mar, impact, stone
D823 Practices for Producing Films of Uniform Thickness
chipping, insect impact, bird dropping, tree sap and staining,
of Paint, Coatings and Related Products on Test Panels
environmental fallout, etc.
D1005 Test Method for Measurement of Dry-Film Thick-
NOTE 1—Vehicle service exposure is not intended to provide the
ness of Organic Coatings Using Micrometers
conditions that are needed for characterizing the long term effects of
D1400 Test Method for Nondestructive Measurement of Dry
weathering or corrosion exposure.
Film Thickness of Nonconductive Coatings Applied to a
3
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 Rating Adhesion by Tape Test
operating environment can be 20 h/day, 7 days/week allowing
D5767 Test Method for Instrumental Measurement of
for accumulation of over 100 000 miles in 10 weeks of
Distinctness-of-Image (DOI) Gloss of Coated Surfaces
exposure.
D7091 Practice for Nondestructive Measurement of Dry
Film Thickness of Nonmagnetic Coatings Applied to
1.3 The values stated in SI units are to be regarded as the
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
standard. The values given in parentheses are for information
ings Applied to Non-Ferrous Metals
only.
2.2 U.S. Federal Standard:
1.4 This standard does not purport to address all of the 4
DOT NHTSA Reg. #49 CFR Part 575
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety, health, and environmental practices and deter-
3.1 Definitions of Terms Specific to This Standard:
mine the applicability of regulatory limitations prior to use.
3.1.1 blistering, n—formation in the film of dome-shaped,
1.5 This international standard was developed in accor-
liquid- or gas-filled projections resulting from local loss of
dance with internationally recognized principles on standard-
adhesion and lifting of the film from the previously applied
ization established in the Decision on Principles for the
coating or the substrate.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
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
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and the ASTM website.
3
Related Coatings, Materials, and Applications and is the direct responsibility of The last approved version of this historical standard is referenced on
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products. www.astm.org.
4
Current edition approved July 1, 2023. Published July 2023. Originally approved Available from U.S. Government Printing Office Superintendent of Documents,
in 1999. Last previous edition approved in 2017 as D6486 – 01 (2017). DOI: 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
10.1520/D6486-23. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ---------------------
...

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: D6486 − 01 (Reapproved 2017) D6486 − 23
Standard Practice for
Short Term Vehicle Service Exposure of Automotive
1
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
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 healthsafety, 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D523 Test Method for Specular Gloss
D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating
Products
D714 Test Method for Evaluating Degree of Blistering of Paints
D823 Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
1
This practice 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 June 1, 2017July 1, 2023. Published June 2017July 2023. Originally approved in 1999. Last previous edition approved in 20112017 as
D6486 – 01 (2011).(2017). DOI: 10.1520/D6486-01R17.10.1520/D6486-23.
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
1

---------------------- Page: 1 ----------------------
D6486 − 23
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)
D3170 Test Method for Chipping Resistance of Coatings
D3359 Test Methods for Rating Adhesion by Tape Test
D5767 Test Method for Instrumental Measurement of Distinctness-of-Image (DOI) Gloss of Coated Surfaces
D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals
and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
2.2 U.S. Federal Standard:
4
DOT NHTSA Reg. #49 CFR Part 575
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 blistering, n—formation in the film of dome-shaped, liquid- or gas-filled projections resulting f
...

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