ASTM D6665-24
(Practice)Standard Practice for Evaluation of Aging Resistance of Pre-stressed Prepainted Metal in a Boiling Water Test
Standard Practice for Evaluation of Aging Resistance of Pre-stressed Prepainted Metal in a Boiling Water Test
ABSTRACT
This practice establishes the standard procedures for evaluating the resistance of pre-stressed prepainted metal panels to cracking and loss of adhesion, or both, after accelerated aging by boiling water. This method shall require the use of boiling water bath, 10x magnifier, Scotch #610 adhesive tape or its equivalent, and deionized or other water as reagent.
SIGNIFICANCE AND USE
3.1 Prepainted metal is supplied as a painted coil, and it is fabricated into a finished part. The fabrication process induces stress to the paint system. To determine if this stress will lead to a failure in service, it is common to immerse the stressed sample in boiling water. If no failure occurs (see 7.4) after exposure to boiling water, it is very unlikely that a failure will occur in the field.
SCOPE
1.1 This practice can be used to evaluate the resistance of a pre-stressed prepainted metal panel to cracking and loss of adhesion, or both, after accelerated aging by boiling water. Most coil coated products are formed and bent into specific shapes to produce a final product. These operations introduce stresses, which may be relieved by cracking of the coating after aging.
1.2 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.
1.3 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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Standards Content (Sample)
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: D6665 − 24
Standard Practice for
Evaluation of Aging Resistance of Pre-stressed Prepainted
1
Metal in a Boiling Water Test
This standard is issued under the fixed designation D6665; 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 stress to the paint system. To determine if this stress will lead
to a failure in service, it is common to immerse the stressed
1.1 This practice can be used to evaluate the resistance of a
sample in boiling water. If no failure occurs (see 7.4) after
pre-stressed prepainted metal panel to cracking and loss of
exposure to boiling water, it is very unlikely that a failure will
adhesion, or both, after accelerated aging by boiling water.
occur in the field.
Most coil coated products are formed and bent into specific
shapes to produce a final product. These operations introduce
4. Apparatus
stresses, which may be relieved by cracking of the coating after
4.1 Boiling water bath large enough to hold formed test
aging.
specimens.
1.2 This standard does not purport to address all of the
4.2 10× magnifier (optional).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.3 Clear, pressure-sensitive tape, natural rubber adhesion,
priate safety, health, and environmental practices and deter-
with the following parameters:
mine the applicability of regulatory limitations prior to use.
4.3.1 Tensile Strength shall be 26.3 N ⁄10mm to 52.6
1.3 This international standard was developed in accor-
N ⁄10mm (15 pounds ⁄inch to 30 pounds ⁄inch).
dance with internationally recognized principles on standard-
4.3.2 Elongation shall be 10 % to 40 %.
ization established in the Decision on Principles for the
4.3.3 Peel strength shall be 3.28 N ⁄10mm to 4.93 N ⁄10mm
Development of International Standards, Guides and Recom-
(30 pounds ⁄inch to 45 pounds/inch).
mendations issued by the World Trade Organization Technical
4.3.4 Total thickness (backing plus adhesive) shall be
Barriers to Trade (TBT) Committee.
0.041 mm to 0.066 mm (1.6 mils to 2.6 mils).
4.3.5 The specific brand of tape to be agreed upon between
3
2. Referenced Documents
the supplier and the user.
2
2.1 ASTM Standards:
5. Reagents
D2794 Test Method for Resistance of Organic Coatings to
5.1 Deionized or other water, as agreed upon by customer
the Effects of Rapid Deformation (Impact)
and vendor.
D4145 Test Method for Coating Flexibility of Prepainted
Sheet
6. Test Specimen
E643 Test Method for Ball Punch Deformation of Metallic
6.1 Prepainted samples that have been deformed by impact,
Sheet Material
drawing, or other mechanical deformation that has been agreed
3. Significance and Use upon between customer and vendor. These should be prepared
according to Test Methods D2794, D4145, E643, and/or
3.1 Prepainted metal is supplied as a painted coil, and it is
prepared in a manner agreed upon by customer and vendor.
fabricated into a finished part. The fabrication process induces
7. Procedure
1
7.1 Examine the test specimens for cracking, flowering and
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
tape pick-off (adhesion loss), and record the results.
Subcommittee D01.53 on Coil Coated Metal.
Current edition approved Feb. 1, 2024. Published February 2024. Originally
3
approved in 2001. Last previous edition approved in 2019 as D6665 – 09 (2019). The sole source of supply of the tape known to the committee at this time is 3M
®
DOI: 10.1520/D6665-24. Company, 3M Center Bldg., St. Paul, MN 55144-1000. 3M Scotch Tape 681 has
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or been found to be a suitable tape for this purpose. If you are aware of alternative
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM suppliers, please provide this information to ASTM International Headquarters.
Standards volume information, refer to the standard’s Document Summary page on Your comments will receive careful consideration at a meeting of the responsible
1
the ASTM website. technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6665 − 24
7.2 Place the formed test specimens in the boiling water 8.2 The degre
...
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: D6665 − 09 (Reapproved 2019) D6665 − 24
Standard Practice for
Evaluation of Aging Resistance of Pre-stressed Prepainted
1
Metal in a Boiling Water Test
This standard is issued under the fixed designation D6665; 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 can be used to evaluate the resistance of a pre-stressed prepainted metal panel to cracking and loss of adhesion,
or both, after accelerated aging by boiling water. Most coil coated products are formed and bent into specific shapes to produce
a final product. These operations introduce stresses, which may be relieved by cracking of the coating after aging.
1.2 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.
1.3 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:
D2794 Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)
D4145 Test Method for Coating Flexibility of Prepainted Sheet
E643 Test Method for Ball Punch Deformation of Metallic Sheet Material
3. Significance and Use
3.1 Prepainted metal is supplied as a painted coil, and it is fabricated into a finished part. The fabrication process induces stress
to the paint system. To determine if this stress will lead to a failure in service, it is common to immerse the stressed sample in
boiling water. If no failure occurs (see 7.4) after exposure to boiling water, it is very unlikely that a failure will occur in the field.
4. Apparatus
4.1 Boiling water bath biglarge enough to hold formed test specimens.
4.2 10× magnifier (optional).
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 D01.53 on Coil Coated Metal.
Current edition approved Dec. 1, 2019Feb. 1, 2024. Published December 2019February 2024. Originally approved in 2001. Last previous edition approved in 20142019
as D6665 – 09 (2014).(2019). DOI: 10.1520/D6665-09R19.10.1520/D6665-24.
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 ----------------------
D6665 − 24
4.3 Scotch #610 adhesive tape or equivalent.Clear, pressure-sensitive tape, natural rubber adhesion, with the following parameters:
4.3.1 Tensile Strength shall be 26.3 N ⁄10mm to 52.6 N ⁄10mm (15 pounds ⁄inch to 30 pounds ⁄inch).
4.3.2 Elongation shall be 10 % to 40 %.
4.3.3 Peel strength shall be 3.28 N ⁄10mm to 4.93 N ⁄10mm (30 pounds ⁄inch to 45 pounds/inch).
4.3.4 Total thickness (backing plus adhesive) shall be 0.041 mm to 0.066 mm (1.6 mils to 2.6 mils).
3
4.3.5 The specific brand of tape to be agreed upon between the supplier and the user.
5. Reagents
5.1 Deionized or other water, as agreed upon by customer and vendor.
6. Test Specimen
6.1 Bumped, bent, drawn or otherwise deformed samples, to be Prepainted samples that have been deformed by impact, drawing,
or other mechanical deformation that has been agreed upon between customer and vendor. These should be prepared according
to Test Methods D2794, D4145, E643, and/or prepared in a manner agreed upon by customer and vendor.
7. Procedure
7.1 Examine the test specimens for cracking, flowering and tape pick-off (adhesion loss), and record the results.
7.2 Place the formed test specimens in the boiling water bath for one (1) min.fifteen (15) minutes. Different times may be used
if agreed upon by customer and vendor.
7.3 Remove the test specimens and allow them to air d
...
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