The 2205 duplex stainless steel (DSS) is an alloy containing 22% of Cr and 5% of Ni. The microstructure of steel is a BCC matrix of d-ferrite with FCC islands of g-austenite grains in the 50:50 ratio. DSS is used in the industry due to its high mechanical strength and corrosion resistance that are better than the corresponding characteristics of ferritic or austenitic stainless steels. In the process of welding, a low-intensity electromagnetic interaction was induced by applying axial external electromagnetic fields of 0, 3, and 12 mT. We performed the microstructural characterization and assessment of localized corrosion resistance in terms of pitting corrosion. The resistance to nucleation and growth of cracks was also evaluated for the low-cycle conditions of corrosion fatigue tests with an aim to observe the behavior of short cracks. It was found that the low-intensity electromagnetic interaction (3 mT) improves the localized corrosion resistance. However, the interaction with 12 mT revealed no improvement in this aspect as compared with 0 mT. The resistances to crack initiation and fracture toughness were also improved as a result of application of external electromagnetic fields with an intensity of 3 mT due to the modification of microstructural evolution in a thermal cycle involved in the process of welding.

2205 双相不锈钢 (DSS) 是一种含有 22% Cr 和 5% Ni 的合金。钢的显微组织是d-铁素体的 BCC 基体，FCC 岛为g- 50:50 比例的奥氏体晶粒。DSS因其高机械强度和耐腐蚀性而被用于工业，优于铁素体或奥氏体不锈钢的相应特性。在焊接过程中，通过施加 0、3 和 12 mT 的轴向外部电磁场引起低强度电磁相互作用。我们对点蚀方面的局部耐腐蚀性进行了微观结构表征和评估。还评估了腐蚀疲劳试验的低循环条件下对裂纹的成核和扩展的抵抗力，目的是观察短裂纹的行为。发现低强度电磁相互作用（3 mT）提高了局部耐腐蚀性。然而，与 0 mT 相比，与 12 mT 的相互作用显示在这方面没有改善。由于焊接过程中涉及的热循环中微观结构演变的改变，施加强度为 3 mT 的外部电磁场也提高了抗裂纹萌生能力和断裂韧性。