ABSTRACT
High-temperature corrosion is often termed dry corrosion, which indicates that it is not aqueous electrolytes that are responsible for the corrosion mechanisms. As will be discussed later, liquid phases can also be involved in this kind of corrosion, which will, however, not be of an aqueous nature. Concerning the temperatures above which hightemperature corrosion is expected to occur, there is a deŽnition in an ISO draft that states [1]: “Corrosion occurring when the temperature is higher than the dew point of aqueous phases of the environment but at least 373 K.” This deŽnition may still be a matter of controversial debate in the corrosion community as this temperature of 373 K is regarded as being too low, but it should be pointed out that the typical forms of high-temperature corrosion resulting from halogen attack (e.g., chlorine gas) can be observed at temperatures lower than 200°C (473 K). Nevertheless, the key criterion distinguishing high-temperature corrosion from wet or aqueous corrosion is the absence of an aqueous electrolyte. There are a number of textbooks addressing the issue of high-temperature corrosion in general with all signiŽcant aspects, which are recommended for further reading (see Refs. [2-10]).
