Arnold engineering development center (AEDC), usaf, tullahoma, tn, has applied various anti-corrosion coating materials on the interior surface of their air duct systems to prevent rust formation which has become a major problem due to high air mass flows at temperature extremes from 120 deg. F to 600 deg. F and to high relative humidity. These attempts by aedc have had only limited success with these coatings. Attempts to procure commercial coatings have not been successful because coatings that will meet all of the criteria are not available in the current market. This proposal discusses a novel approach to formulate a coating system that will meet aedc's end-use application and performance requirements. Material selection criteria, formulation processing, method of testing, and qualification will also be discussed.
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