EXTENSIVE EXPERIENCE, TOGETHER with many exposure programs, has shown that atmospheric corrosion is a phenomenon that varies greatly from location to location [1]. Studies throughout the world have revealed that the rate of atmospheric corrosion is a function of the metal being tested, the location, the climate, the proximity to pollutants, and a variety of other factors. Most people understand that atmospheric corrosion can occur in outdoor exposures, but more recent experience has shown that corrosion can occur from indoor atmospheres under certain circumstances [2].