Corrosion characteristics mechanisms and control methods of candidate alloys in sub and supercritical water Introduction Corrosion types and elemental effects of Ni based and FeCrAl alloys Corrosion characteristics of candidate alloys Corrosion mechanisms of alloys in supercritical water Corrosion behavior of alloys in supercritical water oxidation processes Corrosion control methods in supercritical water oxidation processes Prospects and challenges of candidate alloys used in sub and supercritical water environment. This book aims to provide comprehensive and systematic introduction and summary of corrosion characteristics mechanisms and control methods of candidate alloys in sub and supercritical water environment. First of all corrosion types of candidate alloys and the effects of major alloying elements on corrosion resistance of potential alloys in sub and supercritical water are compared and analyzed. At the same time research status of candidate materials and development and application trends of several corrosion resistant alloys are summarized. Then corrosion characteristics of Ni Cr Ni Cr Mo Ni Fe Cr and Ni Fe Cr Mo Cu corrosion resistant alloys FeCrAl alloy and Zircaloy are discussed in detail including the corrosion rate the structure and composition of oxide film and the effects of various surface treatment processes etc. More specifically it also investigates corrosion behavior of Ni based alloy Fe Ni based and stainless steels in supercritical water. The effects of aggressive species on the corrosion behavior of Ni base alloys are also explored in supercritical water. Readers will further discover the total corrosion processes and mechanisms of typical candidate alloys in sub and supercritical water environment. Finally the work explores the corrosion control methods such as ceramic coatings and passivation processes in supercritical water oxidation and in subcritical water respectively. Future challenges and development trends of corrosion research of candidate materials in sub and supercritical water environments are covered at the end of this book. It offers valuable reference for theoretically guiding material selection and design and operating parameter optimization of key equipment in the sub and supercritical water technologies. The book is written for senior undergraduates graduate students scholars and researchers who are interested in corrosion behavior of candidate materials of supercritical water oxidation system supercritical water gasification system and nuclear reactor.