Pb-39Mg-10Al-1B-Y alloys with Y = 0, 0.2, 0.4, 0.6, 0.8, and 1.0 (wt.%) were fabricated by melting and casting. The microstructure and electrochemical corrosion behavior of the Pb-39Mg-10Al-1B-Y alloys in a 3.5 wt.% NaCl solution were investigated using x-ray diffraction, electron probe microanalysis, and scanning electron microscopy, polarization curve tests, electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). Mg₂Pb + Pb eutectic gains are refined, and the distribution of Mg₁₇Al₁₂ + Mg eutectic gains becomes continuous by with the addition of Y. The polarization curves, EIS results and EN results show that the corrosion resistance of the alloys with various Y concentrations is in the order 0.8 > 1 > 0.6 > 0.4 > 0.2 > 0. The primary corrosion behaviors of Pb-39Mg-10Al-1B-Y alloys when Y ≤ 0.4 wt.% and Y > 0.4 wt.% are general corrosion and localized corrosion, respectively. There is a Mg-Mg₂Pb galvanic cell present with Mg₂Pb as the cathode and Mg as the anode. Moreover, Cl⁻ can accelerate the corrosion of the Mg phase.

通过熔融和铸造制造具有Y = 0、0.2、0.4、0.6、0.8和1.0（重量％）的Pb-39Mg-10Al-1B-Y合金。使用X射线衍射，电子探针显微分析和扫描电子显微镜，极化曲线测试，电化学阻抗谱研究了Pb-39Mg-10Al-1B-Y合金在3.5 wt％NaCl溶液中的微观结构和电化学腐蚀行为。 （EIS）和电化学噪声（EN）。Mg ₂ Pb + Pb共晶增益得到细化，Mg ₁₇ Al ₁₂的分布 通过添加Y，Mg的共晶增益变得连续。极化曲线，EIS结果和EN结果表明，各种Y浓度的合金的耐蚀性依次为0.8> 1> 0.6> 0.4> 0.2> 0。当Y≤0.4 wt。％和Y> 0.4 wt。％时，Pb-39Mg-10Al-1B-Y合金的主要腐蚀行为分别是一般腐蚀和局部腐蚀。存在一个Mg-Mg ₂ Pb原电池，其中Mg ₂ Pb作为阴极，Mg作为阳极。此外，氯^-可以加速Mg相的腐蚀。