ASTM D5722-20

Standard Practice for Performing Accelerated Outdoor Weathering of Factory-Coated Embossed Hardboard Using Concentrated Natural Sunlight and a Soak-Freeze-Thaw Procedure

SIGNIFICANCE AND USE
5.1 The ability to quickly and accurately evaluate and predict long-term weathering performance of factory-applied coatings is of paramount importance in making sound business and technical decisions.  
5.2 It is important to include control specimens of known field performance to determine the efficacy of this practice for specific substrate(s) and coating system(s). These control specimens may include materials known to possess acceptable and unacceptable field performance for the defect(s) under consideration.  
5.3 Results derived from this practice are best used to compare the relative performance of materials tested at the same time in the same device.  
5.4 The inclusion of control specimens and their resulting data will assist in dealing with test variability caused by seasonal or annual variations in important climatic factors.  
5.5 Extensive research was performed during the development of this standard practice. This research showed that this practice is not useful for determination of quantitative acceleration factors. However, this practice is very useful for comparing the performance of different materials.  
5.6 A minimum of two replicates for both control specimens and test specimens is recommended to allow statistical evaluation of results. Refer to Practice G169 for additional guidance on establishing the number of replicates.
SCOPE
1.1 This practice covers techniques to accelerate weathering effects of factory-coated embossed hardboard using Cycle 1 of Practice G90 (concentrated natural sunlight with periodic surface water spray) plus a soak-freeze thaw cycle (see Section 5 of this practice).  
1.2 Testing by use of the methods described in this practice may be employed in the qualitative assessment of weathering effects. The relative durability of coated hardboards may be best determined by comparison of their test results with those of control specimens derived from real time exposure test experience.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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.

General Information

• Status: Published
• Publication Date: 31-May-2020
• ICS: 79.060.20 - Fibre and particle boards
• 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: D5722 − 20
Standard Practice for
Performing Accelerated Outdoor Weathering of Factory-
Coated Embossed Hardboard Using Concentrated Natural
1
Sunlight and a Soak-Freeze-Thaw Procedure
This standard is issued under the fixed designation D5722; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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
1.1 Thispracticecoverstechniquestoaccelerateweathering 2.1 ASTM Standards:
effects of factory-coated embossed hardboard using Cycle 1 of D660Test Method for Evaluating Degree of Checking of
Practice G90 (concentrated natural sunlight with periodic Exterior Paints
surfacewaterspray)plusasoak-freezethawcycle(seeSection D661Test Method for Evaluating Degree of Cracking of
5 of this practice). Exterior Paints
D662Test Method for Evaluating Degree of Erosion of
1.2 Testing by use of the methods described in this practice
Exterior Paints
may be employed in the qualitative assessment of weathering
D772Test Method for Evaluating Degree of Flaking (Scal-
effects. The relative durability of coated hardboards may be
ing) of Exterior Paints
best determined by comparison of their test results with those
D4214Test Methods for Evaluating the Degree of Chalking
of control specimens derived from real time exposure test
of Exterior Paint Films
experience.
G90Practice for Performing Accelerated Outdoor Weather-
1.3 The values stated in either SI units or inch-pound units
ing of Materials Using Concentrated Natural Sunlight
are to be regarded separately as standard. The values stated in
G113Terminology Relating to Natural andArtificial Weath-
each system are not necessarily exact equivalents; therefore, to
ering Tests of Nonmetallic Materials
ensure conformance with the standard, each system shall be
G169Guide for Application of Basic Statistical Methods to
used independently of the other, and values from the two
Weathering Tests
systems shall not be combined.
3. Terminology
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1 The terminology used in this practice is defined in
responsibility of the user of this standard to establish appro-
Terminology G113.
priate safety, health, and environmental practices and deter-
3.2 Definitions:
mine the applicability of regulatory limitations prior to use.
3.2.1 hardboard, n—generic term for a panel manufactured
1.5 This international standard was developed in accor-
primarily from inter-felted lignocellulosic fibers (usually
dance with internationally recognized principles on standard-
wood), consolidated under heat and pressure in a hot press to
ization established in the Decision on Principles for the
3 3
adensityof500kg/m (31lb/ft )orgreaterandtowhichother
Development of International Standards, Guides and Recom-
materialsmayhavebeenaddedduringmanufacturetoimprove
mendations issued by the World Trade Organization Technical
certain properties.
Barriers to Trade (TBT) Committee.
3.2.2 embossed hardboard, n—hardboard that is manufac-
tured with a textured surface.
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
2
Subcommittee D01.27 on Accelerated Testing. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2020. Published June 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1995. Last previous edition approved in 2014 as D5722–14. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D5722-20. the ASTM website.
*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

---------------------- Page: 1 ----------------------
D5722 − 20
3.2.2.1 Discussion—Wood-like and stucco patterns are ex-
amples of typical embossed hardboard surfaces.
4. Summary of Practice
4.1 This practice is used to accelerate long-term weathering
effects by subjecting the samples to concentrated natural
sunlight (with periodic daytime surface water spray) plus a
soak-freeze-thaw cycle.
4.2 This practice has been useful in accelerating finish
failure involving loss of film integrity, such as cracking,
peeling, and flaking of factory-coated embossed hardboard.
5. Significance and Use
...

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: D5722 − 14 D5722 − 20
Standard Practice for
Performing Accelerated Outdoor Weathering of Factory-
Coated Embossed Hardboard Using Concentrated Natural
1
Sunlight and a Soak-Freeze-Thaw Procedure
This standard is issued under the fixed designation D5722; 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 techniques to accelerate weathering effects of factory-coated embossed hardboard using Cycle 1 of
Practice G90 (concentrated natural sunlight with periodic surface water spray) plus a soak-freeze thaw cycle (see Section 5 of this
practice).
1.2 Testing by use of the methods described in this practice may be employed in the qualitative assessment of weathering effects.
The relative durability of coated hardboards may be best determined by comparison of their test results with those of control
specimens derived from real time exposure test experience.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
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 safety, health, and healthenvironmental 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:
D660 Test Method for Evaluating Degree of Checking of Exterior Paints
D661 Test Method for Evaluating Degree of Cracking of Exterior Paints
D662 Test Method for Evaluating Degree of Erosion of Exterior Paints
D772 Test Method for Evaluating Degree of Flaking (Scaling) of Exterior Paints
D4214 Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films
G90 Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G169 Guide for Application of Basic Statistical Methods to Weathering Tests
3. Terminology
3.1 The terminology used in this practice is defined in Terminology G113.
3.2 Definitions:
3.2.1 hardboard, n—generic term for a panel manufactured primarily from inter-felted lignocellulosic fibers (usually wood),
3 3
consolidated under heat and pressure in a hot press to a density of 500 kg/m (31 lb/ft ) or greater and to which other materials
may have been added during manufacture to improve certain properties.
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 D01.27 on Accelerated Testing.
Current edition approved Dec. 1, 2014June 1, 2020. Published January 2015June 2020. Originally approved in 1995. Last previous edition approved in 20082014 as
D5722 – 08.D5722 – 14. DOI: 10.1520/D5722-14.10.1520/D5722-20.
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.
*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

---------------------- Page: 1 ----------------------
D5722 − 20
3.2.2 embossed hardboard, n—hardboard that is manufactured with a textured surface.
3.2.2.1 Discussion—
Wood-like and stucco patterns are examples of typical embossed hardboard surfaces.
4. Summary of Practice
4.1 This practice is used to accelerate long-term weathering effects by subjecting the samples to concentrated natural sunlight
(with periodic daytime surface water spr
...