High-nitrogen austenitic stainless steels show excellent material properties, for example a good combination of strength and ductility as well as corrosion resistance and biocompatibility. In order to obtain a fully austenitic microstructure it is possible to replace the expensive alloy nickel with nitrogen. The corrosion properties of three different CrMnN-alloys were analysed and compared in the present research. One steel was produced using the conventional process, while the other two were manufactured with PESR (Pressure Electro Slag Remelting). The basics and the corrosion mechanisms are discussed and summarized in the literature review. The methodology of the experimental procedure and the results are described and documented in the practical part. The influences and consequences of microstructure, cleanliness and precipitations on corrosion resistance were examined. A clear influence of the manufacturing process on corrosion properties can be observed.