Environmentally Triggered Release of Oxygen-Reduction Inhibitors from Inherently Conducting Polymers Available to Purchase

Background data are presented that support a concept for galvanic and ion exchange release of cathodic (oxygen reduction) corrosion inhibitors from conducting polyaniline (PANI). Such inherently conducting polymers can be potentially formulated into protective coatings for Cu-rich aluminum alloys. The results show that both reduction and ion exchange trigger the release of a species from the conducting polymer that inhibits oxygen reduction on the Cu-rich cathodic phases in the aluminum alloy. These results form the basis for a “smart” corrosion-resistant coating concept.