添加剂对碱性锌酸盐溶液锌电沉积的影响（英文）

发布时间：2018-06-19 20:38

本文选题：电沉积 + 锌　；参考：《Transactions of Nonferrous Metals Society of China》2017年07期

【摘要】：采用扫描电镜表征添加剂对碱性锌酸盐溶液锌电沉积层表面和截面形貌的影响。运用循环伏安法和交流阻抗技术研究不同浓度添加剂在锌电沉积过程中的作用机理。研究结果表明,随着添加剂A浓度的增加,锌的形核过电位增大,对锌还原的抑制作用增强。这是由于添加剂A在阴极表面的吸附作用覆盖了阴极表面活性位点,并阻碍了阴极放电造成的。交流阻抗谱分析表明,在添加剂A存在的情况下,锌电沉积的控制步骤由扩散控制变为混合控制。添加剂B对锌的形核过电位值的影响较小,抑制效果不明显,但同时加入两种添加剂时,在电极表面的吸附作用更加显著,对锌电沉积的抑制作用最大,两者表现出明显的协同作用。
[Abstract]:The effect of additives on the surface and cross section morphology of zinc electrodeposition layer in alkaline zinc salt solution was characterized by scanning electron microscope (SEM). Cyclic voltammetry and AC impedance technique were used to study the action mechanism of different additives in zinc electrodeposition process. The results showed that with the increase of additive A concentration, the nucleation overpotential of zinc increased and the inhibition of zinc reduction was enhanced. This is because the adsorption of additive A on the cathode surface covers the active site of the cathode surface and hinders the cathode discharge. Ac impedance spectroscopy analysis shows that in the presence of additive A, the control step of zinc electrodeposition is changed from diffusion control to mixed control. The effect of additive B on the nucleation overpotential of zinc was not obvious, but the adsorption on the electrode surface was more obvious when the two additives were added at the same time, and the inhibition effect on zinc electrodeposition was the greatest. The two showed obvious synergistic effect.
【作者单位】：中南大学化学与化工学院;中国航天科技集团8511研究所;
【基金】：Project(2014CB643401)supported by the National Basic Research Program of China Projects(51134007,51404299)supported by the National Natural Science Foundation of China
【分类号】：TQ153.15

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