ASTM G90-17
Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight

Standard No.

ASTM G90-17

Release Date

2017

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM G90-23

Latest

ASTM G90-23

Scope

1.1 Fresnel-reflecting concentrators using the sun as source are utilized in the accelerated outdoor exposure testing of materials. 1.2 This practice covers a procedure for performing accelerated outdoor exposure testing of materials using a Fresnelreflector accelerated outdoor weathering test machine. The apparatus (see Fig. 1 and Fig. 2) 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 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 8.2. 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. 1.9 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. 1.10 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.

ASTM G90-17 Referenced Document

• ASTM D1014 Standard Practice for Conducting Exterior Exposure Tests of Paints on Steel
• ASTM D1435 Standard Practice for Outdoor Weathering of Plastics
• ASTM D1898 
• ASTM D4141 Standard Practice for Conducting Black Box and Solar Concentrating Exposures of Coatings
• ASTM D4364 Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
• ASTM D4517 Standard Test Method for Low-Level Total Silica in High-Purity Water by Flameless Atomic Absorption Spectroscopy
• ASTM D5722 Standard Practice for Performing Accelerated Outdoor Weathering of Factory- Coated Embossed Hardboard Using Concentrated Natural Sunlight and a Soak-Freeze-Thaw Procedure
• ASTM D859 Standard Test Method for Silica in Water*， 2021-11-01 Update
• ASTM E816 Standard Test Method for Calibration of Pyrheliometers by Comparison to Reference Pyrheliometers
• ASTM E824 Standard Test Method for Transfer of Calibration From Reference to Field Radiometers
• ASTM E903 Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
• ASTM G113 Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
• ASTM G167 Standard Test Method for Calibration of a Pyranometer Using a Pyrheliometer*， 2023-02-01 Update
• ASTM G169 Standard Guide for Application of Basic Statistical Methods to Weathering Tests*， 2024-04-21 Update
• ASTM G173 Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface*， 2023-03-01 Update
• ASTM G179 Standard Specification for Metal Black Panel and White Panel Temperature Devices for Natural Weathering Tests*， 2019-07-01 Update
• ASTM G24 Standard Practice for Conducting Exposures to Daylight Filtered Through Glass
• ASTM G7 Standard Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials
• SAE J1961 Accelerated Exposure of Automotive Exterior Materials Using a Solar Fresnel Reflector Apparatus*， 2021-07-01 Update
• SAE J576 PLASTIC MATERIALS FOR USE IN OPTICAL PARTS SUCH AS LENSES AND REFLECTORS OF MOTOR VEHICLE LIGHTING DEVICES

ASTM G90-17 history

• 2023 ASTM G90-23 Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
• 2017 ASTM G90-17 Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
• 2010 ASTM G90-10 Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight
• 2005 ASTM G90-05 Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight
• 1998 ASTM G90-98 Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural Sunlight