Accelerated Ozone Aging
The significance of this test method lies in the ability to differentiate between the degrees of ozone resistance under the limited and specified conditions of the accelerated test. The degree of resistance being judged by the appearance and magnitude of the formation of cracks in the surface of the subject material. In service, rubber materials deteriorate when exposed to ozone. It is imperative to have test methods in which simple, accelerated time/exposure, comparisons of the material’s ability to resist cracking caused by ozone exposure can be empirically evaluated. Such tests can be used for producer/consumer acceptance, referee purposes, research, and development.
This test method is used to estimate the effect of exposure, under surface tensile strain conditions, in an atmosphere containing specified levels of ozone concentration, expressed as partial pressure, on vulcanized rubber, rubber compounds, molded or extruded soft rubber, and other specified materials, or as may be determined empirically. The effect of naturally occurring sunlight or light from artificial sources is excluded.
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