A new class of releasable corrosion inhibiting materials for protective coatings,
methods of making the same, methods of using the same, and coatings containing
the same are provided. The materials comprise one or more corrosion inhibitors
that are chemically anchored to the surface of a particle having an aluminum oxyhydroxide
surface through a carboxylate bond. The carboxylate/aluminum-oxyhydroxide-surface
bond breaks under corrosion-causing conditions (for example the presence of high
levels of hydroxide ions generated by the cathodic oxygen reduction reaction on
metals such as iron and aluminum) thereby allowing the corrosion inhibitors to
detach from the particle surface when corrosion is present.