CHAPTER 8: Application of Clay Materials as Nanocontainers for Self-Healing Coatings

This chapter surveys the application of clay materials (in particular halloysites) in self-healing coatings. The release mechanisms of the encapsulated inhibitors are discussed and different shell/stopper compositions are demonstrated for smart response to the local environmental changes in the corroded/damaged area. In general, clay minerals have a loading capacity lower than common polymer capsules, and they do not have large versatility in controlling the release of corrosion inhibitors. However, they are mechanically and thermally robust, cheap and available in thousands of tons.