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Test Method Development for Improved Laboratory Accelerated Weathering of High Performance Coatings

Test Method Development for Improved Laboratory Accelerated Weathering of High Performance Coatings
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The use of accelerated laboratory artificial weathering in coatings development is necessitated by the lengthy times required for natural outdoor weathering. Across a broad range of industries, weathering results from materials exposed in subtropical South Florida have become the benchmark to which accelerated test methods are compared. 

Product Number: 41213-803-SG
Author: Allen Zielnik
Publication Date: 2013
Industries: Test Method , Coatings
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$20.00
$20.00

The use of accelerated laboratory artificial weathering in coatings development is necessitated by the lengthy times required for natural outdoor weathering. Across a broad range of industries, weathering results from materials exposed in subtropical South Florida have become the benchmark to which accelerated test methods are compared. To date, there is substantial inconsistency in correlations between the Florida and laboratory accelerated exposures. An industry consortium of coating OEMs, material suppliers, users and test houses has collaborated on developing a new accelerated test protocol that has demonstrated greatly improved correlation. This new method focuses on both an improved spectral match to sunlight as well as a major improvement to moisture delivery. The new protocol is detailed as well as the validation of the method for high performance automotive and aerospace coatings. This improved method overcomes many of the known shortcomings of industry standard methods and may have major implications for the testing of other systems such as high performance exterior architectural coatings. More importantly, it serves as an example and overall framework for development improved test methods.

The use of accelerated laboratory artificial weathering in coatings development is necessitated by the lengthy times required for natural outdoor weathering. Across a broad range of industries, weathering results from materials exposed in subtropical South Florida have become the benchmark to which accelerated test methods are compared. To date, there is substantial inconsistency in correlations between the Florida and laboratory accelerated exposures. An industry consortium of coating OEMs, material suppliers, users and test houses has collaborated on developing a new accelerated test protocol that has demonstrated greatly improved correlation. This new method focuses on both an improved spectral match to sunlight as well as a major improvement to moisture delivery. The new protocol is detailed as well as the validation of the method for high performance automotive and aerospace coatings. This improved method overcomes many of the known shortcomings of industry standard methods and may have major implications for the testing of other systems such as high performance exterior architectural coatings. More importantly, it serves as an example and overall framework for development improved test methods.

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