Pütz, René M.Sc.
Group Leader Intermetallics and High-Temperature Materials
Chair of Corrosion and Corrosion Protection

Tel.: +49 (0) 241 80 - 93014

Intermetallics and High-Temperature Materials

Besides good mechanical properties at high temperatures, the requirements of high-temperature materials consist of high corrosion resistance. Moreover, cyclic loading conditions, which can occur in capacity-adaptive power plants as well as in the petrochemical and chemical industries, necessarily require materials that possess good high-temperature corrosion properties and withstand the constant changes between high-temperature corrosion (HTC) and aqueous corrosion. The field of research at the Institute for Corrosion Protection comprises of investigations into, on the one hand, the HTC mechanisms, such as oxidation, carburization and sulphidation, and also, on the other hand, corrosion processes under aqueous conditions.

Intermetallic Materials

The class of intermetallic alloy materials solely possessing intermetallic matrix materials, such as TiAl or FeAl, offers new prospects for structural applications demanding stringent requirements such as high-temperature strength or corrosion resistance. By means of new fundamental and applied scientific research, it has been possible to optimise the previously insufficient ductility at room temperature so that many intermetallic phases can now be employed in environment conditions that promote aqueous corrosion.

Currently, iron aluminides represent the most promising variety for substituting stainless steels at room temperature. The research activities in the KKS department focuses on understanding the fundamental corrosion processes and mechanisms, which are related to the aluminium content and other ternary alloying elements, in order to predict the corrosion behaviour in specific applications.

Energy-related Materials

The superposition of mechanical loading and environmental conditions having high operating temperatures demand a constant increase in the requirements of the appropriate materials’ corrosion resistance  Moreover, the thermal-loading cycles, which are familiar in the power generation, petrochemical and chemical industries, not only require materials which are exclusively resistant to high-temperature corrosion (HTC), but also those which withstand the constant change between HTC and aqueous corrosion. In accordance with these industrial requirements, the research activities focus not only on the investigations of HTC mechanisms such as, for example, oxidation carburization and sulphidation, but also their relationship to the overall corrosion resistance whilst in contact with aqueous solutions.