Abstract
NCPTT’s Materials Research program studies the effects of air pollution on cultural resources. Air pollution, generated from man-made sources through the burning of fossil fuels, can affect our monuments, buildings and historic sites. The goals of our work include understanding the how air pollution interacts with the material fabric of cultural resources and what we can do to minimize damage from air pollution through the use of organic coatings and treatments. In this paper, we concentrate on the evaluation of organic coating treatments on calcareous stone upon exposure to sulfur dioxide environments. We present an overview of a unique, custom-built recirculating exposure chamber used to measure sulfur dioxide deposition on untreated and treated calcareous stone. We present the preliminary results of sulfur dioxide uptake on Salem limestone samples treated with experimental water and pollutant repellent coating systems under development by DuPont Corporation. We discuss the experimental design for expansion of this study to a variety of organic coatings used in architectural and objects conservation.
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