ASTM G90-05

Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight

SCOPE
1.1 Fresnel-reflecting concentrators using the sun as source are utilized in the accelerated outdoor exposure testing of nonmetallic materials.
1.2 This practice covers a procedure for performing accelerated outdoor exposure testing of nonmetallic materials using a Fresnel-reflector accelerated outdoor weathering test machine. The apparatus (see and ) and guidelines are described herein to minimize the variables encountered during outdoor accelerated exposure testing.
1.3 This practice does not specify the exposure conditions best suited for the materials to be tested but is limited to the method of obtaining, measuring, and controlling the procedures and certain conditions of the exposure. Sample preparation, test conditions, and evaluation of results are covered in existing methods or specifications for specific materials.
1.4 The Fresnel-reflector accelerated outdoor exposure test machines described may be suitable for the determination of the relative durability of materials exposed to sunlight, heat, and moisture, provided the mechanisms of chemical or physical change, or both, which control the rates of acceleration factors for the materials do not differ significantly.
1.5 This practice establishes uniform sample mounting and in-test maintenance procedures. Also included in the practice are standard provisions for maintenance of the machine and Fresnel-reflector mirrors to ensure cleanliness and durability.
1.6 This practice shall apply to specimens whose size meets the dimensions of the target board as described in .
1.7 For test machines currently in use, this practice may not apply to specimens exceeding 13 mm (1/2 in.) in thickness because cooling may be questionable.
1.8 Values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are provided for information only.
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-2005
• ICS: 19.040 - Environmental testing
• Technical Committee: G03 - Weathering and Durability
• Drafting Committee: G03.02 - Natural and Environmental Exposure Tests

Relations

• Replaces: ASTM G90-98 - Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight
• Effective Date: 01-Oct-2005
• Replaced By: ASTM G90-10 - Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight
• Effective Date: 01-Jun-2010
• Referred By: ASTM G141-09(2021) - Standard Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
• Effective Date: 01-Oct-2005
• Referred By: ASTM E744-07(2022) - Standard Practice for Evaluating Solar Absorptive Materials for Thermal Applications
• Effective Date: 01-Oct-2005
• Referred By: ASTM D4141/D4141M-22 - Standard Practice for Conducting Black Box and Solar Concentrating Exposures of Coatings
• Effective Date: 01-Oct-2005
• Referred By: ASTM G178-16(2023) - Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
• Effective Date: 01-Oct-2005
• Referred By: ASTM G147-17 - Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
• Effective Date: 01-Oct-2005
• Referred By: ASTM G113-22 - Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
• Effective Date: 01-Oct-2005
• Referred By: ASTM G183-15(2023) - Standard Practice for Field Use of Pyranometers, Pyrheliometers and UV Radiometers
• Effective Date: 01-Oct-2005
• Referred By: ASTM D5105-05(2019) - Standard Practice for Performing Accelerated Outdoor Weathering of Pressure-Sensitive Tapes Using Concentrated Natural Sunlight
• Effective Date: 01-Oct-2005
• Referred By: ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
• Effective Date: 01-Oct-2005
• Referred By: ASTM D3794-22 - Standard Guide for Testing Coil Coatings
• Effective Date: 01-Oct-2005
• Referred By: 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
• Effective Date: 01-Oct-2005
• Referred By: ASTM G156-17 - Standard Practice for Selecting and Characterizing Weathering Reference Materials
• Effective Date: 01-Oct-2005
• Referred By: ASTM D4364-13(2022)e1 - Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
• Effective Date: 01-Oct-2005

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: G90 – 05
Standard Practice for
Performing Accelerated Outdoor Weathering of Nonmetallic
1
Materials Using Concentrated Natural Sunlight
This standard is issued under the fixed designation G90; 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.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 Fresnel-reflecting concentrators using the sun as source
bility of regulatory limitations prior to use.
are utilized in the accelerated outdoor exposure testing of
nonmetallic materials.
2. Referenced Documents
1.2 This practice covers a procedure for performing accel-
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2.1 ASTM Standards:
erated outdoor exposure testing of nonmetallic materials using
D859 Test Method for Silica in Water
a Fresnel-reflector accelerated outdoor weathering test ma-
D1014 Practice for Conducting Exterior Exposure Tests of
chine. The apparatus (see Fig. 1 and Fig. 2) and guidelines are
Paints and Coatings on Metal Substrates
described herein to minimize the variables encountered during
D1435 Practice for Outdoor Weathering of Plastics
outdoor accelerated exposure testing.
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D1898 Practice for Sampling of Plastics
1.3 This practice does not specify the exposure conditions
D4141 Practice for Conducting Black Box and Solar Con-
best suited for the materials to be tested but is limited to the
centrating Exposures of Coatings
method of obtaining, measuring, and controlling the proce-
D4517 Test Method for Low-Level Total Silica in High-
dures and certain conditions of the exposure. Sample prepara-
Purity Water by Flameless Atomic Absorption Spectros-
tion, test conditions, and evaluation of results are covered in
copy
existing methods or specifications for specific materials.
E816 Test Method for Calibration of Pyrheliometers by
1.4 The Fresnel-reflector accelerated outdoor exposure test
Comparison to Reference Pyrheliometers
machines described may be suitable for the determination of
E824 Test Method for Transfer of Calibration From Refer-
the relative durability of materials exposed to sunlight, heat,
ence to Field Radiometers
and moisture, provided the mechanisms of chemical or physi-
E891 Tables for Terrestrial Direct Normal Solar Spectral
cal change, or both, which control the rates of acceleration
3
Irradiance for Air Mass 1.5
factors for the materials do not differ significantly.
E903 Test Method for Solar Absorptance, Reflectance, and
1.5 This practice establishes uniform sample mounting and
3
Transmittance of Materials Using Integrating Spheres
in-test maintenance procedures. Also included in the practice
G7 Practice forAtmospheric Environmental Exposure Test-
are standard provisions for maintenance of the machine and
ing of Nonmetallic Materials
Fresnel-reflector mirrors to ensure cleanliness and durability.
G24 PracticeforConductingExposurestoDaylightFiltered
1.6 This practice shall apply to specimens whose size meets
Through Glass
the dimensions of the target board as described in 8.2.
G113 TerminologyRelatingtoNaturalandArtificialWeath-
1.7 For test machines currently in use, this practice may not
ering Tests of Nonmetallic Materials
1
apply to specimens exceeding 13 mm ( ⁄2 in.) in thickness
G167 Test Method for Calibration of a Pyranometer Using
because cooling may be questionable.
a Pyrheliometer
1.8 Values stated in SI units are to be regarded as the
G169 Guide forApplication of Basic Statistical Methods to
standard. The inch-pound units in parentheses are provided for
Weathering Tests
information only.
2.2 Other Standards:
1.9 This standard does not purport to address all of the
SAE J576 Plastic Materials for Use in Optical Parts Such as
safety concerns, if any, associated with its use. It is the
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This practice is under the jurisdiction ofASTM Committee G03 onWeathering For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Durability and is the direct responsibility of Subcommittee G03.02 on Natural contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and Environmental Exposure Tests. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2005. Published November 2005. Originally the ASTM website.
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approved in 1985. Last previous edition approved in 1998 as G90 – 98. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/G0090-05. on www.astm.org.
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