This book offers a comprehensive exploration of the kinetics of hydrogen in metals, focusing on absorption, desorption, dissolution, diffusion, trapping, and permeation. It provides a unique approach to understanding hydrogen behavior in metals, crucial for addressing challenges in hydrogen embrittlement and storage. By introducing advanced techniques for hydrogen detection and mapping, the book offers readers the tools needed to visualize and analyze hydrogen concentration profiles in metals.   Key concepts covered include the diffusivity, permeability, and solubility of hydrogen, as well as the effects of impurities and surface oxides. The author presents a detailed examination of hydrogen loading methods, detection techniques, and the kinetics of hydrogen transport. Readers gain insights into the complexities of hydrogen trapping and detrapping and the importance of simultaneous observations of dissolved and trapped hydrogen.   This book is an essential resource for researchers and professionals in materials science and engineering, particularly hydrogen energy technology. It offers valuable insights for those interested in the latest advancements in hydrogen kinetics and its implications for future work in hydrogen engineering, including embrittlement and storage solutions.