In the petroleum and gas industry, for applications which request high resistance against aggressive media, increasingly clad plates are used. Thermo mechanic forming for achieving optimum mechanical properties of plates partially takes place at temperature levels that are critical for many highly resistant materials. In this temperature ranges phases will precipitate that lead to intergranular corrosion (sensitization of material) in contact with aggressive media. For analysing intergranular corrosion of materials, generally time consuming tests are carried out. A time saving alternative is the electrochemical potentiokinetic reactivation method (EPR) according to ASTM G108, whereas this standard is designed to analyse stainless steels of type AISI 304 and 304L only. With the EPR-method the sensitization of the material is determined by current densitypotential curves. Within the scope of this thesis, the EPR method was adapted to the demands of nickel-base alloy Nicrofer 6020 (Alloy 625). For this purpose 14 different heat treatments of the alloy were tested with various electrolytes. The results of these tests were compared to parallel performed tests according to ASTM G28-A (Streicher). Characterization of the intergranular attack happened by means of scanning electron microscopy. The comparison of the methods finally showed that the test according to ASTM G28-A is still the most reliable method to analyse intergranular corrosion of a nickel-base alloy.