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本文提出使用线性电位扫描和电位衰退法定性和定量分析铅在4.5 mol·dm~(-3)H_2SO_4(30℃)中形成的阳极膜的相组成,并与现场X射线衍射、原子吸收光谱、阳极溶出等法比较。结果表明电位扫描伏安曲线的峰电位和电位扫描至峰电位左右时电极开路后所得的稳定电位可用于阳极膜相组成的定性分析,电位扫描伏安曲线电流峰的面积可用于阳极膜相组成的定量分析。本文的阳极膜由PbO·PbSO_4,PbO_2和PbO_n(2>n>1)组成,以PbO·PbSO_4为主要成分。
This paper presents the qualitative and quantitative analysis of the phase composition of the anodic film formed by lead in 4.5 mol · dm -3 H_2SO_4 (30 ℃) by linear potential sweep and potential decay, and is in good agreement with the field X-ray diffraction, atomic absorption spectroscopy, Anodic dissolution and other methods of comparison. The results showed that the potentials of the potential sweep voltammetry curves and the potential sweeps to the peak potentials could be used for the qualitative analysis of the phase composition of the anode film. The area of the peak of the potential sweep voltammetry current can be used for the anode film phase composition Quantitative analysis. The anode film consists of PbO · PbSO 4, PbO 2 and PbO_n (2> n> 1), with PbO · PbSO 4 as the main component.