What is the ASTM test method for accelerated weathering?

ASTM G154 is the standard test method for operating fluorescent ultraviolet (UV) lamp apparatus for exposure of nonmetallic materials. This test method specifies the conditions for exposing test samples to fluorescent UV lamps that simulate the UV radiation, heat, and moisture of natural sunlight in a controlled laboratory environment.

ASTM G154 covers the procedures for operating the fluorescent UV lamp apparatus, including the selection and preparation of test samples, the exposure conditions, and the evaluation of test results. The standard specifies the irradiance levels, temperature, and humidity conditions for the test, as well as the exposure time required to simulate a certain level of weathering.

 

The test samples can be of various shapes and sizes, including flat panels, films, coatings, and molded parts made of plastic, rubber, or other nonmetallic materials. The test samples are usually exposed to a series of cycles, each consisting of UV radiation exposure, condensation, and darkness, to simulate the natural weathering conditions.

 

ASTM G154 provides a standardized method for evaluating the weathering resistance of nonmetallic materials, and can be used for quality control, product development, and research purposes in various industries, such as automotive, aerospace, building and construction, and consumer products.