By Subramanyam Kasisomayajula and Gerald O. Wilson, Autonomic Materials, Inc. Metals and their alloys such as steel will oxidise to form more thermodynamically stable oxide compounds when exposed to a corrosive environment [1]. Protective coatings are generally used to prevent oxidation, extending the lifetime of the underlying metal substrate. However, damage to the coating may expose the substrate to the environment, significantly decreasing protection. Self-healing functionality based on microencapsulated healing agents has proved to be a viable approach for maintaining a coating's protective capability [2,3]. These ...