Record Display for the EPA National Library Catalog


Main Title Effects of Acidic Deposition on Paint: A Chamber Study.
Author Spence, J. W. ; Lemmons, T. J. ; Hou, Y. ; Schadt, R. J. ; Fornes, R. E. ;
CORP Author North Carolina State Univ. at Raleigh.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher cAug 93
Year Published 1993
Report Number EPA-R-814121-02-4; EPA/600/J-94/355;
Stock Number PB94-209616
Additional Subjects Paints ; Test chambers ; Air pollution ; Atmospheric condensation ; Photochemical reactions ; Smog ; Dew ; Calcium carbonates ; Latex ; Coatings ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB94-209616 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Exterior acrylic latex and alkyd architectural coatings were exposed to different conditions in a chamber exposure system involving simulated sunlight, dew, and photochemical smog-containing sulfur dioxide (SO2). A simulated sunlight exposure of the coating films in the presence of clean air was also incorporated into the experimental design. Changes in surface features after 1,370 hours of exposure were characterized by scanning electron microscope (SEM) and energy dispersive analysis of x-rays (EDAX). Gaseous species that deposited to the films were determined by ion chromatography of the dew collections. Color-change measurements of the exposed films were recorded as Delta E values. Latex and alkyd films that were formulated with calcium carbonate (CACO3) as an extender pigment were found to undergo the most change in surface features, composition, and color.