Abstract
The chemical composition of heat resistant austenitic stainless steels, is optimized with regard to reach good mechanical properties and oxidation resistance at higher temperatures. But in some circumstances, before starting up the power plant or during operation these materials can get into contact with corrosive condensates. This can cause material failure due to intergranular corrosion if the concerned components are in a sensitized state. To detect these critical material states the application of the electrochemical potentiodynamic reactivation (EPR)‐test would be useful. Therefore, the present work compares the results of the EPR‐test to the findings obtained from microstructural analyses and intergranular corrosion tests acc. to DIN EN ISO 3651‐2 (Strauss‐test). The following comparison is needed to discuss the applicability of this electrochemical method to ascertain the susceptibility to intergranular corrosion of the heat resistant austenitic stainless steel TP310HCbN after stress relief heat treatment.
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