The PREN value of the alloy may lead to a misleading prediction of pitting corrosion resistance because in the event of an imbalance of  ferrite and austenite volume fraction, the chemical composition of the phases may be very different from that of the alloy. In this case, the PREN of one of the phases may be below the PREN of the alloy. Three laminated duplex stainless steels with different PRENs were characterized: UNS S32304 (Lean Duplex), UNS S31803 (Duplex) and UNS S32750 (Super Duplex). Several complementary techniques of microstructural analysis were used, such as optical emission spectrometry, optical microscopy and scanning electron microscopy with coupled EDS. Quantitative metallographic analyzes were carried out to determine the volume fraction of  ferrite and austenite, and semi-quantitative chemical analyzes of the present phases, using a coupled EDS-SEM. For all the alloys studied, it was observed that the  ferrite presents higher Cr and Mo contents than the austenite phase, which had N contents higher than the  ferrite. The PREN of  ferrite is higher than that observed for austenite for both UNS S32304 (Lean Duplex) and UNS S31803 (Duplex). In UNS S32750 (Super Duplex), the PREN of the austenite is higher than that observed for  ferrite due to the higher content of N of this alloy.