High-temperature corrosion of materials for heat recovery systems

Metallic heat exchangers and recuperators used in industrial processes for extracting heat from flue gas streams can be subject to severely corrosive high-temperature environments. Principal modes of attack upon metals and alloys frequently encountered in various industrial processes are discussed. These corrosion modes include oxidation, sulfidation, carburization, and chlorination. The high-temperature alloys that are resistant to these types of environmental attack are discussed in terms of laboratory results. Suitable alloys for application in each principal environment are suggested