High-temperature corrosion

High-temperature corrosion refers to a chemical attack from gases, solid or molten salts, or molten metals, typically at temperatures above 400°C (750ºF). Examples of high-temperature corrosion are:

In specific applications, erosion corrosion can be a problem. Additionally, condensates formed at shutdowns may cause wet-corrosion attacks.

Materials for high-temperature service can not be selected on the grounds of their corrosion resistance alone. Their creep strength and structural stability also need to be taken into account

High-temperature corrosion testing

In Sandvik's high-temperature corrosion laboratory, testing is mainly performed in air (dry or humid). In addition to this, the laboratory is equipped to run tests in nitriding environments with N2 and tests in environments with low oxygen concentrations. Corrosive deposits can also be used.

Testing in atmospheres for special high-temperature applications (for example where metal dusting is concerned) are carried out at external laboratories, suitably equipped for that type of testing.

For more comprehensive results, Sandvik materials are also often tested in the actual plants for which they are considered.