Environmental etch resistance of automotive coatings predicted by the ADF-weathering test
Environmental etch resistance of automotive coatings predicted by the ADF-weathering test
- New search for: Schulz, U.
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- New search for: Schulz, U.
- New search for: Trubiroha, P.
- New search for: Zwick, W.
Acid precipitations are known to cause the formation of water spots and acid etches at the surfaces of modern automotive basecoat/clearcoat systems. These defects of coating surfaces occur sporadically, because they depend on a large number of randomly occuring conditions like frequency, combination and acidity of the actual atmospheric precipitations. Therefore, also currently used outdoor exposure tests in locations having a high incidence of acid rain, dew or fog, often show contradicting data of coating weatherability. Up till now standardized artificial weathering test methods do not incorporate conditions such as controlled, introduced variables like acid depositions. Therefore, a new artificial weathering test for automotive finishes, the so-called ADF (Acid-Dew and Fog)-test, was developed. To show the improvements by this test method several modern coatings were examined by different artificial and natural exposure tests. Compared to other artificial test methods differences of the coating performance data provided by outdoor exposure in harsh environment could be reproduced in the best manner by the ADF-test.
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Environmental etch resistance of automotive coatings predicted by the ADF-weathering test
Vorhersage der Chemikalienbeständigkeit von Karosseriebeschichtungen durch den ADF-Bewitterungsversuch
1997
8 Seiten, 4 Bilder, 6 Quellen
Conference paper
English
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