Process of treatment of an Al alloy surface, particularly a piece of TiAl alloy, and application of organic halocarbon compounds or halogenides bound in an organic matrix

摘要

Articles of aluminum alloy are shaped at normal temperatures and then have an organic halogen-carbon compound, or a matrix containing such a compound, applied to the surface. The article is then heated up to at least 700 degrees C so that the halogen combines with the aluminum and the organic components evaporate. Heating can take place when the article is in use for the first time. An Independent claim is also included for the use of this process to improve the oxidation resistance of aluminum alloys, especially titanium-aluminum alloys. Application of organic halogen compounds can be by brush, spraying or dipping to produce between 3.5x10-12 and 6.5x10-4 mol fluorine/cm2.