Coatings are generally applied to the surface of objects for decorative, protective and functional purposes. There are multiple techniques of coating that can be applied to alter properties of substrates, make surfaces anti-reflective or corrosion resistant, or conducive to the flow of electric current, etc. This book presents the science behind coating, its applications, conceptual developments and new techniques. It is a valuable compilation of topics, ranging from the basic to the most complex advancements in this area. It strives to provide a fair idea about this field and to help develop a better understanding of the latest advancements in the applications of coatings. Scientists and students actively engaged in this field will find this book full of crucial and unexplored concepts.