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In this work, the electrochemical characterization of 2205 duplex stainless steel welded plates (6.35mm thick) was carried out. The plates were gas metal arc welded (GMAW) in a single pass using two gas mixtures, Ar+2%O2 (M1) and Ar+3% N2 (M2). With the M1 gas mixture an axial magnetic field of 3 mT was applied. Optical and scanning electron microscopy techniques were used for microstructural characterization of the welded joints focusing on qualitative and quantitative analyses of the phases present in the weld zone. These results were correlated with the electrochemical tests employed for measuring sensitization and resistance to pitting corrosion. It was found that the application of an axial magnetic field of 3 mT improves the resistance to localized corrosion in aqueous media with chloride ions, both in the weld metal and in the heat affected zone due to the increased regeneration of austenite, which might arrests the precipitation and growth of detrimental phases

Electrochemical Characterization of AISI 2205 Duplex Stainless Steel Welded Joints with Electromagnetic Interaction