Abstract Dual phase (DP) steels have a great deal of importance in the automotive industry. These steels are used to fabricate structural parts of vehicles with the goal of passenger safety. In this study, the corrosion properties of DP 600 and 800 steel in 3.5 wt.% NaCl environment were evaluated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and weight loss methods. Although the samples were quite similar to each other in their composition, it was observed that the very small differences changed the corrosion resistance property. For this reason, the calculated charge transfer resistance (Rct) of the DP-800 in the 3.5 wt.% NaCl environment was 51% greater than that of the DP-600 sample. This finding was confirmed by using weight loss, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and optical profilometer (OP) analysis.

中文翻译：

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双相 600 和 800 钢在 3.5 wt.% NaCl 环境中的腐蚀行为

摘要 双相 (DP) 钢在汽车工业中具有重要意义。这些钢用于制造以乘客安全为目标的车辆结构部件。在本研究中，使用电化学阻抗谱 (EIS)、动电位极化 (PDP) 和失重方法评估了 DP 600 和 800 钢在 3.5 wt.% NaCl 环境中的腐蚀性能。尽管样品的成分非常相似，但观察到非常小的差异改变了耐腐蚀性。出于这个原因，DP-800 在 3.5 wt.% NaCl 环境中的计算电荷转移电阻 (Rct) 比 DP-600 样品大 51%。通过使用重量损失、扫描电子显微镜 (SEM)、