ASTM D2485-22

Standard Test Methods for Evaluating Coatings For High Temperature Service

SIGNIFICANCE AND USE
4.1 Some coating systems are developed for use over steel that is exposed to high temperatures during service life. This method provides an accelerated means of determining the performance of these coating systems. Testing of coatings designed for interior service, and of coatings designed for exterior (weather-exposed) service is included.
SCOPE
1.1 These test methods cover the evaluation of the heat-resistant properties of coatings designed to protect steel surfaces exposed to elevated temperatures during their service life. Two test methods are described as follows:
Method A—Interior Service Coatings
Method B—Exterior Service Coatings  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 5.  
1.4 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.

General Information

• Status: Published
• Publication Date: 30-Nov-2022
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.27 - Accelerated Testing

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: D2485 − 22
Standard Test Methods for
1
Evaluating Coatings For High Temperature Service
This standard is issued under the fixed designation D2485; 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 These test methods cover the evaluation of the heat-
Related Coating Products
resistant properties of coatings designed to protect steel sur-
D823 Practices for Producing Films of Uniform Thickness
faces exposed to elevated temperatures during their service
of Paint, Coatings and Related Products on Test Panels
life. Two test methods are described as follows:
D1186 Test Methods for Nondestructive Measurement of
Method A—Interior Service Coatings
Dry Film Thickness of Nonmagnetic Coatings Applied to
Method B—Exterior Service Coatings
3
a Ferrous Base (Withdrawn 2006)
1.2 The values stated in SI units are to be regarded as the
D2200 Practice for Use of Pictorial Surface Preparation
standard. The values given in parentheses are for information
Standards and Guides for Painting Steel Surfaces
only.
G7 Practice for Natural Weathering of Materials
1.3 This standard does not purport to address the safety
3. Summary of Test Methods
concerns, if any, associated with its use. It is the responsibility
of whoever uses this standard to consult and establish appro- 3.1 Panels suitably coated with the material under test are
priate safety, health, and environmental practices and deter-
evaluated under one or both of two test methods depending on
mine the applicability of regulatory limitations prior to use. the intended usage.
Specific hazard statements are given in Section 5.
3.1.1 Test Method A, Interior Service Coatings—Coated
1.4 This international standard was developed in accor- panels are heated for 24 h in a muffle furnace at a temperature
dance with internationally recognized principles on standard- agreed upon between the purchaser and the seller. One panel is
ization established in the Decision on Principles for the plunged into water and the other cooled and then subjected to
Development of International Standards, Guides and Recom- a bend test.
mendations issued by the World Trade Organization Technical 3.1.2 Test Method B, Exterior Service Coatings—Coated
Barriers to Trade (TBT) Committee. panels are subjected to temperatures that increase in steps from
205 °C to 425 °C (400 °F to 800 °F). One panel is subjected to
2. Referenced Documents
salt spray for 24 h, and one is exposed outdoors for 12 months.
2
2.1 ASTM Standards:
3.2 When tests are completed, the panels are examined for
A36/A36M Specification for Carbon Structural Steel
evidence of film degradation including rust formation,
A283/A283M Specification for Low and Intermediate Ten-
blistering, loss of adhesion, dulling, and chalking.
sile Strength Carbon Steel Plates
4. Significance and Use
A285/A285M Specification for Pressure Vessel Plates, Car-
bon Steel, Low- and Intermediate-Tensile Strength
4.1 Some coating systems are developed for use over steel
B117 Practice for Operating Salt Spray (Fog) Apparatus
that is exposed to high temperatures during service life. This
D522 Test Methods for Mandrel Bend Test of Attached
method provides an accelerated means of determining the
Organic Coatings
performance of these coating systems. Testing of coatings
designed for interior service, and of coatings designed for
exterior (weather-exposed) service is included.
1
These test methods are under the jurisdiction of ASTM Committee D01 on
5. Apparatus
Paint and Related Coatings, Materials, and Applications and are the direct
responsibility of Subcommittee D01.27 on Accelerated Testing.
5.1 Automatic spray equipment as described in Practices
Current edition approved Dec. 1, 2022. Published December 2022. Originally
D823 (Method A) or any other suitable method that will give
approved in 1966. Last previous edition approved in 2018 as D2485 – 18. DOI:
10.1520/D2485-22.
the required uniformity of film and film thickness.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at
...

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: D2485 − 18 D2485 − 22
Standard Test Methods for
1
Evaluating Coatings For High Temperature Service
This standard is issued under the fixed designation D2485; 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 These test methods cover the evaluation of the heat-resistant properties of coatings designed to protect steel surfaces exposed
to elevated temperatures during their service life. Two test methods are described as follows:
Method A—Interior Service Coatings
Method B—Exterior Service Coatings
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of
whoever uses this standard to consult and establish appropriate safety, health, and environmental practices and determine the
applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 5.
1.4 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:
A36/A36M Specification for Carbon Structural Steel
A283/A283M Specification for Low and Intermediate Tensile Strength Carbon Steel Plates
A285/A285M Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength
B117 Practice for Operating Salt Spray (Fog) Apparatus
D522 Test Methods for Mandrel Bend Test of Attached Organic Coatings
D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating
Products
D823 Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels
D1186 Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous
3
Base (Withdrawn 2006)
D2200 Practice for Use of Pictorial Surface Preparation Standards and Guides for Painting Steel Surfaces
G7 Practice for Natural Weathering of Materials
1
These test methods are under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility of
Subcommittee D01.27 on Accelerated Testing.
Current edition approved March 1, 2018Dec. 1, 2022. Published March 2018December 2022. Originally approved in 1966. Last previous edition approved in 20132018
as D2485 – 91 (2013).D2485 – 18. DOI: 10.1520/D2485-18.10.1520/D2485-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D2485 − 22
3. Summary of Test Methods
3.1 Panels suitably coated with the material under test are evaluated under one or both of two test methods depending on the
intended usage.
3.1.1 Test Method A, Interior Service Coatings—Coated panels are heated for 24 h in a muffle furnace at a temperature agreed upon
between the purchaser and the seller. One panel is plunged into water and the other cooled and then subjected to a bend test.
3.1.2 Test Method B, Exterior Service Coatings—Coated panels are subjected to temperatures that increase in steps from
205205 °C to 425°C (400425 °C (400 °F to 800°F).800 °F). One panel is subjected to salt spray for 24 h, and one is exposed
outdoors for 12 months.
3.2 When tests are completed, the panels are examined for evidence of film degradation including rust formation, blistering, loss
of adhesion, dulling, and chalking.
4. Significance and Use
4.1 Some coating systems are developed for use over steel that is exposed to high temperatures during service l
...