Releasable corrosion inhibitor compositions

Details Releasable corrosion inhibitor compositions Releasable corrosion inhibitor compositions

C - Chemistry, Metallurgy

23

F

C23F 11/00 (2006.01)

Patent

CA 2606407

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.

L~invention fournit une nouvelle classe de matériaux libérables empêchant la corrosion pour des revêtements de protection, leurs procédés de fabrication, leurs procédés d~utilisation, et des revêtements les contenant. Les matériaux comprennent un ou plusieurs inhibiteurs de corrosion qui sont chimiquement ancrés à la surface d'une particule ayant une surface d'oxyhydroxyde d~aluminium par l~intermédiaire d~une liaison carboxylate. La liaison carboxylate/surface d~oxyhydroxyde d~aluminium se casse dans des conditions entraînant la corrosion (par exemple la présence de niveaux élevés d~ions hydroxyde produits par la réaction cathodique de réduction de l'oxygène sur des métaux tels que le fer et l'aluminium) permettant de ce fait aux inhibiteurs de corrosion de se détacher de la surface des particules lorsque la corrosion est présente.

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