摘  要本文采用线性扫描和恒电位等电化学方法并结合了形貌分析研究了不同pH条件下磁场对锌在NaCl溶液中阳极溶解过程的影响。研究表明在酸性条件下，磁场能够促进Zn的阳极溶解；而在中性和碱性条件下磁场的作用比较复杂。这可能是由于Zn是两性金属，在酸性和碱性条件下的溶解机理不同，因此磁场的作用不同。在中性溶液中相同电位下，较低强度的磁场(100 mT)促进Zn的阳极溶解；而高强度的磁场(200和400 mT)的作用则是抑制。69117

该论文有图5幅，表3个，参考文献14篇。

毕业论文关键词：磁场  锌  阳极溶解  pH  NaCl

Effects of Magnetic Field on the Anodic Dissolution of Zinc in NaCl Solution

Abstract

In this paper, the effects of the magnetic field on the anodic dissolution of Zn in NaCl solution with different pH were studied by the potential scanning and potentiostatic electrochemical methods connected with the analysis of the surface morphologies. The results showed that the magnetic field enhanced the anodic dissolution of Zn in acidic solution; however, the magnetic field effects were sophisticated in neutral and alkaline solutions. The reasons were that the mechanisms of Zn in acidic and alkaline solutions were different due to an amphiprotic metal of Zn. Thus the magnetic field effects were different in solutions with different pH. In the neutral solution at the same potential, the low intensity of magnetic field (100 mT) promoted the anodic dissolution of Zn, while the high intensity magnetic field (200 and 400 mT) inhibited the anodic dissolution.

Key Words: magnetic field  zinc  anodic dissolution  pH  NaCl

目  录

摘要Ⅰ

Abstract-Ⅱ

目录Ⅲ

图清单-Ⅳ

表清单-Ⅳ

变量注释表-Ⅴ

1 绪论-1

2 实验部分-1

3 实验结果和讨论2

3.1 磁场对锌在不同pH条件下NaCl溶液中线性扫描曲线的影响2

3.2 不同磁场强度对Zn在NaCl溶液线性扫描曲线的影响-3

3.3 磁场对Zn在NaCl溶液中j-t曲线的影响4

3.4 磁场对电极形貌的影响-6

4 结论-8

参考文献9

致谢11

图清单

图序号 图名称 页码

图3-1 不同pH条件下磁场对锌在0.5M NaCl溶液中线性扫描曲线的影响 3

图3-2 磁场对Zn在0.5M NaCl溶液中阳极极化曲线的影响 4

图3-3 E= -0.2 V vs SCE时不同磁场对j-t曲线的影响 5

图3-4 E= 0.2 V vs SCE时不同磁场对j-t曲线的影响 6

图3-5 未反应电极(A0)及磁场对E= -0.2 V vs SCE时Zn在NaCl溶液中阳极极化150 s后的电极表面形貌图(A1-A4) 7

表清单

表序号 表名称 页码

表3-1 磁场对E= -0.2 V vs SCE及-0.28 V vs SCE时阳极电流的影响 2

表3-2 磁场对图2中E= -0.5 V vs SCE时电流密度及i-E曲线斜率的影响 4

表3-3 E= -0.2 V vs SCE磁场对Zn的阳极溶解的影响 5

变量注释表