Interest in multifunctional coatings has grown in recent years as end users seek high-performance surface protection combined with added features. Therefore, the idea of smart coatings that can respond to stimuli has become very attractive. Research groups continue to investigate novel coating systems that can self-heal, self-clean, and provide on-demand corrosion protection, among other functionalities. Some of these technologies have been commercialized on a small scale, while others are nearing commercialization and many more are in the early stages of discovery and development.
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