Abstract This work investigates the understanding between microstructure and corrosion behaviour of SDSS 2594 wall component fabricated using gas metal arc welding (GMAW) based wire arc additive manufacturing (WAAM) process, with the help of optical micrographs and electrochemical corrosion tests. Potentiodynamic polarization tests and Electrochemical impedance spectroscopy (EIS) analysis in 3.5% NaCl solution revealed excellent pitting resistance while the corrosion rate ranged between 1.51 and 1.61 mils per year (mpy) with pitting resistance equivalent number (PREN) > 40. The intergranular corrosion (IGC) test results confirmed the absence of sensitization and highlights that the formation of passive film is compact for corrosive environments.

中文翻译：

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深入了解电弧添加剂制造的超级双相不锈钢 (ER2594) 的微观结构特征和腐蚀性能

摘要 本工作借助光学显微照片和电化学腐蚀测试，研究了使用气体保护金属电弧焊 (GMAW) 基电弧增材制造 (WAAM) 工艺制造的 SDSS 2594 壁部件的微观结构和腐蚀行为之间的理解。在 3.5% NaCl 溶液中的动电位极化测试和电化学阻抗谱 (EIS) 分析显示出优异的耐点蚀性，而腐蚀速率介于每年 1.51 和 1.61 密耳 (mpy) 之间，耐点蚀等效值 (PREN) > 40。 IGC) 测试结果证实没有敏化，并强调钝化膜的形成对于腐蚀环境是紧凑的。