The objective of this book is to serve as a comprehensive source of information on the history, metallurgy, and corrosion behavior of Nickel-based alloys. In this regard, the author hopes to combine fundamental knowledge of the metallurgy, chemistry, and electrochemistry relevant to these alloys with practical applications of these alloys in the corrosion field. The overall theme of the book will be how to use the state-of-the-art knowledge of corrosion mechanisms and metallurgy in selecting and evaluating these alloys. Such an approach, it is hoped, will provide the reader tools to better apply these alloys and possibly develop new alloys. The book aims to cover both low and high temperature corrosion phenomena.