: It defines the procedures for exposing materials directly to the elements (sunlight, moisture, and temperature) to determine their durability and service life. Nonmetallic Focus
For more information on ASTM G7 and environmental exposure testing, visit: astm g7 pdf
The standard emphasizes using control specimens—materials with known, established weathering characteristics—to compare the performance of the new test material. ASTM G7 PDF Download Information : It defines the procedures for exposing materials
The material behind the test specimen changes its thermal profile: This maximizes annual solar radiation
Atmospheric weathering poses a significant threat to nonmetallic materials. Over time, sunlight, moisture, and temperature fluctuations degrade polymers, coatings, and composites. To predict performance and ensure durability, manufacturers rely on standardized testing protocols.
Racks are tilted at an angle equal to the geographic latitude of the test site, facing the equator. This maximizes annual solar radiation.