You are here:
EFFECTS OF ACIDIC DEPOSITION PAINTS: A CHAMBER STUDY
Citation:
Spence, J., T. Lemmons, Y. Hous, R. Schadt, R. Fornes, AND R. Gilbert. EFFECTS OF ACIDIC DEPOSITION PAINTS: A CHAMBER STUDY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/355.
Description:
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). imulated 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). aseous 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 elta E values. atex 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.