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Free keywords:
Conducting polymers; Corrosion inhibitors; Corrosion resistant coatings; Defects; Self-healing materials, Active agents; Coating system; Intrinsically conducting polymer; Ionic transportation; Performance; Released inhibitors; Safe storage; Scanning kelvin probe; Self-healing coating; Triggered release, Polypyrroles
Abstract:
There are many studies on different concepts for so called smart self-healing coatings providing safe storage and corrosion triggered release of inhibitors. However, achieving an efficient transport of the released inhibitor to the defect is so far a widely neglected issue, although it is crucial for the overall performance. Hence, an in-depth investigation was carried out on inhibitor transport through the coating system into the defect, based on dedicated model sample set-ups. The main focus was on the possible beneficial role of an interfacial polypyrrole layer on the overall performance. Especially for some organic inhibitors huge effects were observed. © 2021
