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Considerations for Characterizing Moisture Effects in Coatings Weathering Studies

From Atlas Material Testing Technology LLC
 

 
This paper investigates the effects of weathering factors on moisture absorption of coatings and presents results from several projects including real-time and accelerated weathering studies of coatings moisture absorption. Moisture variable characteristics observed in outdoor exposure environments are reviewed. Data is presented from experiments performed in end-use and accelerated weathering environments to characterize moisture characteristics on coatings. The information from natural outdoor environment characterizations and DOEs indicate new approaches for characterizing coatings weathering with regard to moisture effects. Considerations and new approaches for performing coating weathering studies are discussed. Modern outdoor coatings in end-use react in varying degrees to environmental factors (variables). Sunlight, temperature, and moisture often play critical roles in degradation of coatings in end-use. Consequently, researchers include these factors in weathering test method development. The coatings industry recently increased focus regarding the effects of moisture on coatings degradation. The effects of moisture and its interactions with other weathering factors on coatings degradation represent critical considerations for some coating systems end-use performance.
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Topics of Interest
Researchers know moisture plays a key role in weathering of many materials and often place moisture in a set of three primary weathering variables with sunlight and temperature. Researchers use... (Read More)
This presentation broadly overviews several key aspects of coatings weathering and durability. Recent empirical data is included to introduce some fundamental variables and environmental... (Read More)
One may consider the recent history of the weathering discipline (the past 100 years or so) as an evolution of weathering experiments. This evolution trends from simpler, single variable experiments... (Read More)
The solar spectral power distribution (SPD) represents a critical variable in natural and artificial weathering processes. Weathering research often requires reference SPDs representative of end-use... (Read More)
OVERVIEW The UV curing process is predominantly determined by the desired application of the coating. The intended end-product governs the substrate to be coated. This may be an abrasion resistant... (Read More)