ビニル系単量体による電解重合膜の成長機構と被覆金属の耐食性の相関

概要

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Electro-polymerized (EP) films based on acrolein (Ac) and on 2-vinylpyridine (VPy) monomers were synthesized on various metals, and the relationship between the growth mechanism of the two types of films and the corrosion resistance of the coated metals was investigated. At all conditions of electro-polymerization, VPy films were thicker (about 10μm vs 1μm for Ac). In corrosion tests, metals coated with the VPy films had better corrosion resistance than those coated with Ac films. The growth mechanisms of the two types also differed. During electropolymorization, the Ac films acted as an insulator, but those based on VPy acted as an ion-conductor. The study showed that the metal coated with EP film is more corrosion resistant if the film that are ion-conducting during electropolymerization can i) form thicker films, and ii) make possible easier insulation after post-treatment than insulationg films.
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