<p>Duplex stainless steels (DSSs) have widely been used as structural materials in the marine industries due to the superior mechanical properties and excellent corrosion resistance. In this study, the salt spray corrosion behavior of three nitrogen-containing duplex stainless steels (DSSs) via wire arc additive manufacturing (WAAM) is studied by polarization curve and electrochemical impedance spectroscopy (EIS) measurements, combined with scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). The results indicate that the radius of the electrochemical impedance spectrum first increases and then decreases with increasing the salt spray time. The decrease of the <i>R</i>_ct demonstrates that the corrosion resistance reduces beyond 576&#xa0;h of the salt spray time. With increasing the nitrogen content, the corrosion current of the deposited metals is decreased. The XPS analysis of the passive films on the deposited metals confirms the presence of Fe₂O₃, Fe(OH)₃, FeOOH and Cr₂O₃. The salt spray corrosion resistance of the deposited metals increases with increasing the nitrogen content.</p>