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 oxidationsystem, supercritical water gasification system, and nuclear reactor.

Dr. Donghai Xu is full Professor in Department of Energy and Power Engineering in Xi'an Jiaotong University. His research got many kinds of funds such as the National Key Research and Development Program of China, the National Natural Science Foundation of China, the Joint Funds of Natural Science Basic Research Plan in Shaanxi Province of China, the Seventh Batch Special Fund of the China Postdoctoral Science Foundation, the Fundamental Research Funds for the Central Universities, and the Special Financial Grant from the Shaanxi Province Postdoctoral Science Foundation, etc. He has published one book in Springer Press, and two books in Xi'an Jiaotong University Press, and 94 SCI papers which cited by more than 2600 times, with the H-index of 24. He has 50 China invention patents and two USA patents. His research fields include alloy corrosion and control, supercritical water oxidation of organic pollutants, hydrothermal liquefaction of microalgae, hydrogen production by supercritical water gasification. He is the Guest Editor of Energies, the Associate Editor of Journal of Biosensors & Renewable sources, the editorial board member of American Journal of Chemical Engineering, and the member of American Chemical Society, etc. He was awarded Gold award in Technology Workers Innovation and Entrepreneurship Competition in Shaanxi Province, Gold award in the 8th International Exhibition of Inventions, 
Shuwei Guo is currently a Ph.D. candidate of Xi'an Jiaotong University (XJTU, China). His specialization fields include corrosion behavior and mechanisms of Ni-based alloys as candidate materials of supercritical water oxidation system, corrosion control methods of stainless steel in supercritical water environments.