Enhancement of corrosion resistance of protective coatings formed by spontaneous surface polymerization

• Published in: International journal of adhesion and adhesives Vol. 23; no. 6; pp. 499 - 506
• Main Authors: Wu, Chunyong, Bell, James P., Davis, Guy D.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2003; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Corrosion protective layer; Surface reaction; Autopolymerization; Aluminium; Maleimide derivative copolymer; Organic phosphonate; Experimental study; Property processing relationship; Corrosion inhibitor; Corrosion resistance; Bismaleimide resin; Chemical treatment; Acrylamide copolymer; Methacrylate copolymer; Styrene copolymer
• ISSN: 0143-7496; 1879-0127
• DOI: 10.1016/S0143-7496(03)00092-7

The corrosion resistance of a novel protective coating formed by spontaneous polymerization on aluminum was studied. The polymer coating was formed from styrene,
n-phenyl maleimide, bismaleimide, 2-(methacryloyloxy) ethyl acetoacetate, and
N-isobutoxymethyl acrylamide. A corrosion inhibitor, Nitrolotris (methylene) triphosphonic acid, was also used to protect the aluminum surface under the coating after polymerization. The resultant coating showed very good corrosion resistance in water immersion tests, salt fog and cyclic tests, and excellent adhesive bond strength, especially wet, in a torsional test. Incorporation of an internal plasticizer monomer, ethylene glycol methyl ether acrylate further enhanced coating durability.