High-temperature Corrosion
High-temperature corrosion is a phenomenon where metals deteriorate due to reactions with a reactive gas or fluid in a high-temperature environment.
High-temperature corrosion occurs as an oxide or sulfide layer forms on the surface, which can also promote internal erosion that becomes a problem in various fields, such as energy production, chemical processes, and aircraft engines.
Additionally, since high-temperature environments accelerate all corrosion processes, high-temperature corrosion can also change the microstructure of metals.
Specific examples of environments where high-temperature corrosion is induced are as follows:
- When oxygen reacts with a metal to form an oxide layer, it occurs in a combustion process or a high-temperature oxidation environment, such as in car engines or generators.
- When sulfur compounds generated from the combustion of petroleum products or coal react with a metal, such as in power plants or oil refineries.
- Salt from seawater causes corrosion in high-temperature environments, such as marine facilities and ships.
- Chlorine gas or chlorides can cause corrosion in high-temperature environments, such as those found in water treatment plants and chemical factories.
To suppress the occurrence of high-temperature corrosion under the conditions mentioned above, it is necessary to take appropriate measures according to each situation.