ASTM G155: Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
Standard: ASTM G155 – Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
Scope: Per ASTM C99: “This practice is limited to the basic principles and procedures for operating a xenon arc lamp and water apparatus; on its own, it does not deliver a specific result. It is intended to be used in conjunction with a practice or method that defines specific exposure conditions for an application along with a means to evaluate changes in material properties. This practice is intended to reproduce the weathering effects that occur when materials are exposed to sunlight (either direct or through window glass) and moisture as humidity, rain, or dew in actual use.
Applicable Products: All Materials Exposed to Sunlight
Test Procedures: Test specimens are exposed to light from an optically filtered xenon arc lamp under controlled environmental conditions. Different types of optical filters in combination with xenon arc light sources are described. Specimen preparation and evaluation of the results are covered in the ASTM methods or specifications for specific materials. General guidance is given in Practice ASTM G21. Specimens are exposed to repetitive cycles of controlled light, heat, and moisture.
End Result: Evaluation of material property changes after exposure period
Special Notes (if any): Accelerated weathering practices have no correlation to real time. Therefore, predictive testing to a specific period of time is not possible. These tests are best suited to comparison testing of products for performance ranking or as a compliance effort to some set standard, such as building code, or project specification. Test reports will not express the durability or service life of a product.
Intertek Testing Locations: York, PA