To assess the corrosion resistance of Cu-Fe deformation in situ alloys in a chloride ion environment, Cu-Fe alloys with varying Fe contents (5 wt%, 10 wt%, and 14 wt%) were prepared using vacuum induction melting, and the impact of Fe content on the corrosion resistance was examined. The corrosion morphology and corrosion products were analyzed, and the corrosion rate, corrosion period, dynamic potential polarization curves, electrochemical parameters, and electrochemical impedance spectra with different Fe contents were determined. However, the corrosion resistance of Cu-Fe alloys initially increased with an increase in Fe content before decreasing, with Cu-10 wt% Fe alloys (95% reduction rate) exhibiting the best corrosion resistance. As the Fe content increased, the amount of primary Fe phase gradually increased and became more densely distributed. This led to an increase in the dense oxide film on the surface, thereby enhancing the corrosion resistance of the material. Moreover, with a further increase in Fe, the primary Fe phase exhibited coarsening and non-uniform distribution. This resulted in the oxide film becoming looser, leading to a decreased corrosion resistance of the alloy.

中文翻译：

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原位加工Cu-Fe变形合金在氯离子环境中的耐蚀性能

为了评估 Cu-Fe 原位变形合金在氯离子环境中的耐腐蚀性，采用真空感应熔炼制备了不同 Fe 含量（5 wt%、10 wt% 和 14 wt%）的 Cu-Fe 合金，并研究了Fe含量对耐腐蚀性能的影响。分析腐蚀形貌和腐蚀产物，测定不同Fe含量下的腐蚀速率、腐蚀周期、动电位极化曲线、电化学参数和电化学阻抗谱。然而，Cu-Fe合金的耐腐蚀性首先随着Fe含量的增加而增加，然后下降，其中Cu-10 wt% Fe合金（95%还原率）表现出最好的耐腐蚀性。随着Fe含量的增加，初生Fe相的数量逐渐增多且分布更加致密。这导致表面致密氧化膜的增加，从而增强材料的耐腐蚀性。此外，随着Fe含量的进一步增加，初生Fe相呈现粗化且分布不均匀的趋势。这导致氧化膜变得疏松，导致合金的耐腐蚀性下降。