ASTM D5722-03

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
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.
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 reference specimens may include materials known to possess acceptable and unacceptable field performance for the defect(s) under consideration.
Results derived from this practice are best used to compare the relative performance of materials tested at the same time in the same device.
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. However, quantitative service life approximations “acceleration factors” based on the above data are not recommended unless a sufficient number of field/accelerated test comparisons have been analyzed to compute the statistical significance of the “time to failure” estimate for each exposure.
A minimum of two replicates for both control specimens and test specimens is recommended to allow statistical evaluation of results.
SCOPE
1.1 This practice covers techniques to accelerate weathering effects of factory-coated embossed hardboard using apparatus described in Practice G 90.
1.2 This practice is based upon Cycle 1 of Practice G 90 (concentrated natural sunlight with periodic surface water spray) plus a soak-freeze-thaw cycle (see 5 of this practice).
1.3 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 pass-fail control specimens derived from real time exposure test experience (see 8.2 for specific guidelines).
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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-Sep-2003
• ICS: 79.060.20 - Fibre and particle boards
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.27 - Accelerated Testing

Relations

• Replaces: ASTM D5722-95 - Standard Practice for Performing Accelerated Outdoor Weathering of Factory- Coated Embossed Hardboard Using Concentrated Natural Sunlight and a Soak-Freeze-Thaw Procedure
• Effective Date: 01-Oct-2003
• Replaced By: ASTM D5722-08 - Standard Practice for Performing Accelerated Outdoor Weathering of Factory- Coated Embossed Hardboard Using Concentrated Natural Sunlight and a Soak-Freeze-Thaw Procedure
• Effective Date: 01-Jul-2008
• Referred By: ASTM G90-23 - Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
• Effective Date: 01-Oct-2003

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
Designation:D5722–03
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D4214 Test Methods for Evaluating the Degree of Chalk-
3
ing of Exterior Paint Films
1.1 Thispracticecoverstechniquestoaccelerateweathering
G90 Practice for Performing Accelerated Outdoor Weath-
effects of factory-coated embossed hardboard using apparatus
ering of Nonmetallic Materials Using Concentrated Natu-
described in PracticeG90.
ral Sunlight
1.2 This practice is based upon Cycle 1 of Practice G90
G113 Terminology Relating to Natural and Artificial
(concentrated natural sunlight with periodic surface water
Weathering Tests of Nonmetallic Materials
spray) plus a soak-freeze-thaw cycle (see Section 5 of this
practice).
3. Terminology
1.3 Testing by use of the methods described in this practice
3.1 The terminology used in this practice is defined in
may be employed in the qualitative assessment of weathering
TerminologyG113.
effects. The relative durability of coated hardboards may be
3.2 Definitions:
best determined by comparison of their test results with those
3.2.1 hardboard—generic term for a panel manufactured
of pass-fail control specimens derived from real time exposure
primarily from inter-felted lignocellulosic fibers (usually
test experience (see 8.2 for specific guidelines).
wood), consolidated under heat and pressure in a hot press to
1.4 The values stated in SI units are to be regarded as the
3 3
a density of 0.50 g/cm (31 lb/ft ) or greater and to which other
standard. The values given in parentheses are for information
materialsmayhavebeenaddedduringmanufacturetoimprove
only.
certain properties.
1.5 This standard does not purport to address all of the
3.2.2 embossed hardboard—hardboardthatismanufactured
safety concerns, if any, associated with its use. It is the
with a textured surface.
responsibility of the user of this standard to establish appro-
3.2.2.1 Discussion—Wood-like and stucco patterns are ex-
priate safety and health practices and determine the applica-
amples of typical embossed hardboard surfaces.
bility of regulatory limitations prior to use.
4. Summary of Practice
2. Referenced Documents
2 4.1 This practice is used to accelerate long-term weathering
2.1 ASTM Standards:
effects by subjecting the samples to a concentrated natural
D660 Test Method for Evaluating Degree of Checking of
sunlight (with periodic daytime surface water spray) plus a
Exterior Paints
soak-freeze-thaw cycle.
D661 Test Method for Evaluating Degree of Cracking of
4.2 This practice has been useful in accelerating finish
Exterior Paints
failure involving loss of film integrity, such as cracking,
D662 Test Method for Evaluating Degree of Erosion of
peeling, and flaking of factory-coated embossed hardboard.
Exterior Paints
D772 Test Method for Evaluating Degree of Flaking (Scal-
5. Significance and Use
ing) of Exterior Paints
5.1 The ability to quickly and accurately evaluate and
predict long-term weathering performance of factory-applied
1
coatings is of paramount importance in making sound business
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
and technical decisions.
Subcommittee D01.27 on Accelerated Testing.
5.2 It is important to include control specimens of known
Current edition approved Oct. 1, 2003. Published October 2003. Originally
field performance to determine the efficacy of this practice for
approved in 1995. Last previous edition approved in 1995 as D5722–95.
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
3
the ASTM website. Withdrawn.
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D5722–03
specific substrate(s) and coating system(s). These reference
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 result
...