Abstract In this work, the influence of pulse frequency on the corrosion resistance of Cu–Zn binary alloy has been investigated by using electrochemical workstation, scanning electron microscope and X-ray diffraction. The results have shown that after the electric pulse treatment, the average grain size in the microstructure of high-zinc binary brass decreased and the corrosion resistance increased. The thickness of dezincification layer decreased from 49.8 to 30.8 µm. The diameter of capacitive reactance arc increased from 741.1 to 2898.0 µm. The corrosion potential increased from −0.2719 to −0.2378 V, and the corrosion current density decreased from 6.3147 × 10−6 to 4.6971 × 10−7 A cm−2 by one magnitude order.

中文翻译：

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脉冲频率对Cu-Zn二元合金耐蚀性的影响机制

摘要 本工作利用电化学工作站、扫描电子显微镜和X射线衍射研究了脉冲频率对Cu-Zn二元合金耐蚀性的影响。结果表明，电脉冲处理后，高锌二元黄铜显微组织中的平均晶粒尺寸减小，耐蚀性提高。脱锌层的厚度从 49.8 µm 减少到 30.8 µm。容抗弧直径从 741.1 µm 增加到 2898.0 µm。腐蚀电位从-0.2719 增加到-0.2378 V，腐蚀电流密度从6.3147 × 10-6 下降到4.6971 × 10-7 A cm-2 一个数量级。