In this paper, the effect of Mn²⁺ (≤160 mg/L) on the anodic film properties and corrosion behavior of Pb-0.07%Ca-1.25%Sn anodes in acidic CuSO₄ electrolyte is clarified. The anode was polarized in an electrolyte containing different concentrations of Mn²⁺ ions for 48 h to obtain a stable oxide film on the surface. The phase composition and morphology of the oxide layer formed on the Pb-0.07%Ca-1.25%Sn anode after polarization were characterized by the XRD, SEM, and EDS techniques. The influence of Mn²⁺ (≤160 mg/L) on the electrochemical behavior of the Pb-0.07%Ca-1.25%Sn anode was investigated in 45 g/L Cu²⁺ and 180 g/L H₂SO₄ solution via cyclic voltammetry, galvanostatic polarization, Tafel, and EIS measurements. In addition, the anodic weight loss, film formation, and corrosion mechanism of the anode are also proposed. The results reveal that the film formed on the Pb-0.07%Ca-1.25%Sn anode exhibited a gradient Pb|PbSO₄|α-PbO₂|α-PbO₂-β-MnO₂ layer in the Mn²⁺-containing electrolytes. Then, during the oxygen evolution reaction (OER), the gradient layer was oxidized to MnO₂, which was irregularly attached to the surface of the substrate and increased the roughness of the film. The presence of Mn²⁺ accelerated the corrosion of the anode in the electrolyte and reduced the anodic oxygen evolution potential. When the concentration of Mn²⁺ ions reached 160 mg/L, the corrosion rate was increased by 62.3% despite the anode potential decreasing by 30 mV.

本文阐明了Mn ²⁺（≤160mg / L）对酸性CuSO ₄电解质中Pb-0.07％Ca-1.25％Sn阳极的阳极膜性能和腐蚀行为的影响。将阳极在含有不同浓度Mn ²⁺离子的电解质中极化48小时，以在表面上获得稳定的氧化膜。用XRD，SEM和EDS技术对极化后在Pb-0.07％Ca-1.25％Sn阳极上形成的氧化物层的相组成和形貌进行了表征。在45 g / L Cu ²⁺和180 g / LH ₂ SO _4中研究了Mn ²⁺（≤160mg / L）对Pb-0.07％Ca-1.25％Sn阳极电化学行为的影响通过循环伏安法，恒电流极化，Tafel和EIS测量获得的溶液。另外，还提出了阳极的阳极失重，成膜和腐蚀机理。结果表明，形成在所述的Pb-0.07％的膜的Ca-1.25％的Sn阳极表现出梯度的Pb |硫酸铅₄ |α-PBO ₂ |α-PBO ₂ -β-的MnO ₂层中的锰²⁺含电解质。然后，在氧气析出反应（OER）期间，梯度层被氧化成MnO ₂，该MnO ₂不规则地附着在基板表面上并增加了膜的粗糙度。Mn ²⁺的存在加速了阳极在电解液中的腐蚀，并降低了阳极氧放出的电位。当Mn ²⁺离子的浓度达到160 mg / L时，尽管阳极电势降低了30 mV，但腐蚀速率却提高了62.3％。