Coating for inhibiting oxidation of a substrate

摘要

A film (11) which may be placed on a metallic substrate (12) to inhibit corrosion of the substrate when in a corrosive environment. The film (11) also inhibits corrosion at a defect area (18) in the film (11) when the substrate (12) is exposed in the presence of a corrosive environment. The film (11) includes dopants (26) which release from the film (11) when corrosion begins at a film defect. Therefore, the film not only inhibits corrosion where the film is undamaged, but also inhibits corrosion at the site of a defect in the film. Advantageously, the system does not lose its effectiveness over a given period of time if no defect occurs in the substrate (Fig. 1).