正十二硫醇自组装单层膜改善环氧涂层腐蚀防护性能的研究

Study of the Effect of n-Dodecanethiol Self-assembled Monolayer on the Improvement of Corrosion Protection of Epoxy Coating

通过在正十二硫醇自组装单层膜表面制备环氧树脂涂层的方法 ,在涂层 /铜基体界面引入自组装界面层 .采用X射线光电子能谱、电化学阻抗谱、阻抗 -时间谱和相位角 -时间谱等方法对硫醇自组装界面层及其对涂层腐蚀防护性能的影响进行了研究 .结果表明 ,引入的自组装单层可极大地改善涂层的腐蚀防护性能 .

By formation of epoxy coating on n-dodecanethiol self-assembled monolayer on copper substrate, self-assembled monolayer was introduced between epoxy coating and copper electrode. The formation of self-assembled interfacial n-dodecanethiol monolayer and its effect on the corrosion protection of epoxy coating were evaluated using the X-ray photoelectronic spectroscopy, electrochemical impedance spectroscopy, impedance-time transition, and phase angle-time transition method. It was found that, the self-assembled interfacial monolayer can improve the corrosion protection of the epoxy coating greatly. The mechanism for the great improvement was discussed.