PROTECTIVE FLUORIDE COATINGS FOR ALUMINUM ALLOY ARTICLES

摘要

An aluminum alloy article (14) is cleaned to remove oxides (70) and organic matter (72) from a coatable surface, coated with a composition comprising an organic resin and a fluorine compound (30), and then heated (56) to an elevated temperature to decompose the organic resin and at least a portion of the fluorine compound (30). After heating, the coated surface is left with a protective oxyfluoride film (80) that prevents blistering (13) and hydrogen pickup and promotes hydrogen degassing from the article (14).