Corrosion-responsive coating formulations for protection of...

C - Chemistry – Metallurgy – 09 – D

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C09D 5/08 (2006.01) C08F 2/46 (2006.01) C08J 3/28 (2006.01) C09D 141/00 (2006.01) C23F 11/00 (2006.01) C23F 11/18 (2006.01) B05D 3/06 (2006.01)

Patent

CA 2491359

Methods and compositions are described for protecting a metal surface against corrosion. The method involves applying to the metal surface a coating formulation that comprises a radiation curable resin and a corrosion- responsive agent that is capable of releasing a corrosion-inhibiting ion in response to exposure to ionic species characteristic of those present on a metal surface undergoing oxidative corrosion; and exposing the coating formulation to radiation whereby the radiation curable resin forms a corrosion- resisting coating having a low spontaneous release rate of the corrosion- responsive agent into the environment.

L'invention concerne des procédés et des compositions permettant de protéger une surface métallique contre la corrosion. Le procédé consiste à appliquer à la surface métallique une formulation de revêtement comprenant une résine durcissable par rayonnement et un agent anticorrosion susceptible de libérer un ion inhibiteur de corrosion en réponse à l'exposition à des espèces ioniques caractéristiques de ceux présents sur la surface métallique subissant une corrosion oxydative; et à exposer la formulation de revêtement au rayonnement au terme duquel la résine durcissable par rayonnement forme un revêtement anticorrosion dont le taux de libération spontanée de l'agent anticorrosion dans l'environnement est faible.

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