Simulated service testing is the most reliable predictor of corrosion behavior that is important for specific objectives. These include materials selection, predicting the probable service life of a product or structure, evaluating new commercial alloys and processes, and calibrating laboratory corrosion tests in short of in-plant tests and actual service experience. This article provides a detailed discussion on the types of atmospheres used in simulated service testing. It describes the specifics of atmospheric-corrosion test that include equipment, test arrangement, and test specimen; factors affecting atmospheric corrosion; and evaluation of exposed atmospheric-corrosion panels. The article concludes with a discussion on...