**3. Conclusion**

The encapsulation of coating matrixes with active agents provides an advanced route to maintain the properties of metallic materials used in different technological applications. Also the functionalization of surface with active materials by manipulating the molecular composition adds another route to prevent corrosion. Further the coating thickness and number of layer optimization is strictly needed to achieve an efficient coating. Therefore not only on the material development but also focus should be given to manage the compatibility among the coating layers and efficiencies of carrier material to hold active agents for targeted applications. This book aims to present detailed information and current advancements in the coatings technology applied to prevent the metallic substrates from corrosion maintaining its integrity.
