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ASTM D6944-09e1

(Practice)

Standard Practice for Resistance of Cured Coatings to Thermal Cycling

Standard Practice for Resistance of Cured Coatings to Thermal Cycling

SIGNIFICANCE AND USE
4.1 The purpose of this test is to obtain information on the ability of a coating system to adhere to substrates under thermal stress. It is assumed that the coating systems used are applied and cured according to the given specifications of the coating manufacturer.
SCOPE
1.1 This practice determines the resistance of cured coatings to repeated thermal cycles. This procedure is designed to assess the influence of thermal cycling on adhesion and other properties of coatings. This procedure is not intended to provide a quantitative measure of the service life that can be expected from a specific coating system on a given substrate.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Jun-2009
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.46 - Industrial Protective Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D6944-09 - Standard Practice for Resistance of Cured Coatings to Thermal Cycling
Effective Date
01-Jul-2009
Replaced By
ASTM D6944-15 - Standard Practice for Determining the Resistance of Cured Coatings to Thermal Cycling
Effective Date
01-Jul-2015
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Jul-2009
Referred By
ASTM D3794-22 - Standard Guide for Testing Coil Coatings
Effective Date
01-Jul-2009

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ASTM D6944-09e1 - Standard Practice for Resistance of Cured Coatings to Thermal CyclingASTM D6944-09e1 - Standard Practice for Resistance of Cured Coatings to Thermal Cycling
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ASTM D6944-09e1 - Standard Practice for Resistance of Cured Coatings to Thermal Cycling
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: D6944 − 09
StandardPractice for
1
Resistance of Cured Coatings to Thermal Cycling
This standard is issued under the fixed designation D6944; 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
ε NOTE—Editorial corrections were made in 7.1.2 and 10.1.2 in March 2014.
1. Scope 3.2 Test Method B—Cured test specimens are subjected to
30 thermal cycles of freezing and heating.
1.1 Thispracticedeterminestheresistanceofcuredcoatings
torepeatedthermalcycles.Thisprocedureisdesignedtoassess
4. Significance and Use
the influence of thermal cycling on adhesion and other prop-
erties of coatings. This procedure is not intended to provide a 4.1 The purpose of this test is to obtain information on the
quantitative measure of the service life that can be expected ability of a coating system to adhere to substrates under
from a specific coating system on a given substrate. thermal stress. It is assumed that the coating systems used are
applied and cured according to the given specifications of the
1.2 This standard does not purport to address all of the
coating manufacturer.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
TEST METHOD A—FREEZE/THAW/IMMERSION
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Thermal Cycling Apparatus:
2
2.1 ASTM Standards:
5.1.1 The thermal cycling apparatus shall consist of a
D660 Test Method for Evaluating Degree of Checking of
suitable chamber or chambers in which the test specimens may
Exterior Paints
undergo the specified cycle. Ideally, a chamber which contains
D661 Test Method for Evaluating Degree of Cracking of
heatingandrefrigerationequipmentandimmersioncapabilities
Exterior Paints
in the same unit should be used. This chamber shall have the
D714 Test Method for Evaluating Degree of Blistering of
ability to maintain continuous reproducible cycles within the
Paints
specified temperature requirements. In the event that an appa-
D3359 Test Methods for Measuring Adhesion by Tape Test
ratus having freezing, heating, and immersion capabilities is
D4541 Test Method for Pull-Off Strength of Coatings Using
not available, separate equipment for freezing, heating and
Portable Adhesion Testers
immersion may be used.
D6677 Test Method for Evaluating Adhesion by Knife
5.1.2 The chamber or chambers shall have the ability to
G147 Practice for Conditioning and Handling of Nonmetal-
maintain a constant temperature during each of the respective
lic Materials for Natural and Artificial Weathering Tests
temperature intervals as specified by the procedure.
5.1.3 The samples shall be arranged to minimize contact
3. Summary of Test Methods
with the chamber surfaces or any mounting racks, and to
3.1 Test Method A—Cured test specimens are subjected to maximize air flow.
5.1.4 Thetemperatureofthethermalcyclingapparatusshall
30 thermal cycles of immersion, freezing and heating.
give uniform readings at various locations within the chamber,
within3°C(5°F)atanygiventime,exceptduringthetransition
between heating and freezing cycles. A two hour temperature
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
rampingperiodispermittedfortheequipmenttoreachthenext
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
temperature setting.
Current edition approved July 1, 2009. Published July 2009. Originally approved
in 2003. Last previous edition approved in 2003 as D6944 – 03. DOI: 10.1520/
6. Test Specimens
D6944-09E01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Apply each coating onto the substrate as agreed upon.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Minimum film thicknesses should take substrate profile into
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. account when applied.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
´1
D6944 − 09
6.2 Apply each coating or coating system to a minimum of 8.1.2 The chamber or chambers shall have the ability to
two specimens to determine repeatability. If the substrate of maintain a constant temperature during each of the respective
choice is concrete, then suitable encapsulation of the substrate temperature intervals as specified by the proc
...

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