This book provides a comprehensive exploration of the fundamentals of corrosion and its impact on marine components and structures. Drawing on both collaborative research and extensive analysis of real-world studies by engineers and scientists, it bridges the gap between theoretical corrosion science and practical engineering applications. The text begins by introducing the basic principles of aqueous corrosion, establishing a solid foundation for understanding the underlying mechanisms that affect marine environments. It then examines the critical aspects of seawater chemistry and how they influence corrosion behaviour, highlighting the implications for marine equipment and infrastructure. Following this, the book provides a detailed discussion of the various types of corrosion that can afflict marine structures and components, offering insights into the challenges faced in real-world conditions. Finally, the book presents practical strategies and methods for controlling and mitigating corrosion in marine applications. Written for engineers, researchers, and students in marine, materials, and structural engineering, it serves as both a valuable reference and a guide to understanding, preventing, and managing corrosion in demanding marine environments.