Abstract The sections in this article are Introduction High Temperature Corrosion in Technical Applications High Temperature Corrosion Resistance Fundamentals of Oxidation Stability of the Corrosion Product Formation and Growth of Oxide Scales Initial Stages Defect Chemistry Scale Growth by Solid State Diffusion Scale Growth Controlled by Mechanisms Other than Solid State Diffusion Specific Aspects of Oxide Scale Growth on Alloys Internal Oxidation/Corrosion The Influence of Mechanical Stress on Oxidation Stresses in Oxide Scales Mechanical Scale Failure Healing of Oxide Scale Cracks The Role of Internal Corrosion Chemical Scale Failure Sulfate Induced Hot Corrosion Vanadate Induced Hot Corrosion Corrosion Without the Formation of a Solid Scale Molten Phases as Corrosion Products Volatile Corrosion Products Gas Corrosion by Species Other than Oxygen Carburization and Metal Dusting Internal Carburization Metal Dusting Sulfidation Chlorination Water Vapor Hydrogen Experimental Techniques