Abstract
This paper is dealing with investigations on interrelations between microstructure and corrosion behaviour of duplex stainless steel X2CrNiMoN22-5-3. With the application of conventional methods like Strauss- and Huey-test it is not possible to describe correctly the corrosion behaviour. In contrary, by means of the development of the electrochemical potentiodynamic reactivation (EPR) method it is possible to give a reliable proof of corrosion susceptibility. The knowledge about the corrosion of duplex stainless steel was intensified by fundamental investigation of interrelations between precipitations and corrosion behaviour. By means of numerous investigations on the microstructure by means of SEM and TEM secondary phases were analysied and quantified and depletion areas created by precipitations were characterized.
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