1-ethyl-3-methylimidazolium dicyanamid modified polypyrrole coating

摘要

The hydrophilic nature and ionic mobility through the organic polymer coatings limits their use in anticorrosive applications. However, their oxidizing ability against various technical metals captured much attention, considering anodic protective behavior. The reversibly oxidation-reduction behavior of conducting polymer leads to storage and discharge of electrical charge and dopant anion, reversibly. This behaviour gives chance to design a primary coating which could deliver corrosion inhibiting species directly to defective area. It is already known that similar application was utilized in medicine technologies successfully; controlled dose releasing system. Along defective area, the metal oxidation occurs readily at metal/polymer interface and the polymer film (which is nobler to metal) is reduced. Since the driving force of the overall process is the metal oxidation (i.e. corrosion), the primary coating will release inhibitor molecules where it is exactly needed. Also the polymer film reduction will help metal surface passivation, by means of modifying corrosion products.