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Tag Articles : automotive coatings

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  ASTM D7869 or SAE J2527 – Which is More Appropriate?

  October 16, 2023 | Dr. Florian Feil

  Standards

  Over ten years ago, ASTM D7869 “Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings” was first introduced as a new and revolutionary weathering standard for automotive and general transportation coatings. This standard is based on the careful consideration of photochemical- and moisture-related coating degradation and a hot, humid end-use environment.

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  The Truth About Rack Back Spray and Its Use in SAE J1960/SAE J2527

  August 2, 2021 | Oscar Cordo

  Technology Standards

  It is no secret that moisture is a major degradation mechanism for many materials. Relative humidity, rainfall, and one-off applications of water to a material’s surface all contribute to degradation in their own ways. This was recognized by Bill Lane, a member of the founding family of Atlas, through the works of Fred Stieg Jr., a paint and coatings researcher, that were published throughout the 1960’s. Stieg’s paper titled “Accelerating the Accelerated Weathering Test” from 1966 and his subsequent paper “The Dew Cycle Weather-Ometer® Re-evaluated - A Literature Review” in 1975 led to the development of the Atlas Dew Cycle Weather-Ometer®, a modified Sunshine Carbon Arc instrument with rack spray that was equipped with a chiller to enhance the formation of dew on the surface of samples under test.

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