It is a matter of great pleasure for me to present this book for researchers, academicians, and students related to corrosion inhibition study. Each chapter in this book gives you the idea to systematize your plan of action to study and use a corrosion inhibitor for the corrosion inhibition of metal. Various techniques used to study corrosion inhibition are explained in detail. Techniques used are weight loss, polarization, electrochemical impedance spectroscopy, and DFT study. I hope that my effort will cater to the needs of corrosion inhibitor scientists and they will enjoy the topics covered in this book. I would feel rewarded if they will achieve their goal with the help of this book. All attempts have been made to make it free of errors. In the last constructive criticism and valuable suggestion from the readers are most welcome to make their effort more useful.