【摘要】本课题主要研究黄铜的阳极溶解用什么样的电化学技术去完成，黄铜中的铜和锌在什么情况下会发生溶解，大概在什么样的电位下黄铜可以完成溶解，在使用循环伏安法研究时波峰在什么情况下出现，研究不同电流密度下电极的溶解现象，阳极的形貌如何变化，其中阳极的组成在反应过程中的变化。

先用伏安曲线法，对不同浓度下的黄铜片进行试验找出峰值。再在赫尔槽中，以1A的恒电流进行电解，分5个不同的电解时间，电解结束按电流密度从底到高进行区域裁剪，分别通过电镜和金相显微镜观察表征。找出最佳的电解时间，在通过图表找出最好的电流密度。最后在最佳的电流密度下，对不同浓度的电解液在不同温度下对黄铜片在玻璃槽中电解，同样通过电镜和金相显微镜观察表征。

通过观察发现，两种浓度的电解液都在20分钟时第六片黄铜片的晶型较好，对应图表得出电流密度为5A/d m²。最后的温度对比发现40℃时两种浓度的电解液在电流密度下晶型较好。

关键词：黄铜片  腐蚀  硫酸锌

Study on anodic dissolution behavior of brass in zinc sulfate solution

Abstract:This topic is mainly to study the electro chemical technology of the anodic dissolution of brass. The copper and zinc in brass will dissolve in what condition. At what kind of potential, the brass can be dissolved. In what case the wave peak appears under the cyclic voltammetry study, the electrode is studied under different current density. How to change the morphology of the anode, and the change of the composition of the anode in the reaction process.

First, volt ampere curve method was used to find out the peak value of brass slices under different concentrations. In the Hull tank, the electrolysis was carried out with the constant current of 1A. The electrolysis time was pided into 5 different electrolysis times. The electrolysis was cut at the bottom to high by the current density, and was observed by electron microscope and metallo graphic microscope respectively. Find out the best time of electrolysis and find out the best current density through charts. At the best current density, the electrolytes with different concentrations were electrolyzed in the glass trough at different temperatures, and were also characterized by electron microscopy and metallo graphic microscopy.

Through observation, it was found that the crystal shape of the sixth brass chips was better in 20 minutes when the two concentrations of electrolyte were all in good shape, and the current density was sixth m 5A/d. At the end of the temperature comparison, it is found that the electrolyte of two concentrations is better at the current density at 40 ℃。

Keywords:  Brass   corrosion  zinc sulfate

目录

摘要.. 1

Abstract.. 1

1.绪论1

  1.1研究背景.1

  1.2黄铜耐腐蚀性..2

  1.3普通黄铜的特征和相的晶体结构4

  1.4测试腐蚀电化学的数据方法..6

    1.4.1电极电位系统测试..6

    1.4.2赫尔槽实验..7

2.实验使用的试剂和设备 8

3.电化学测试及表征方法9

  3.1原始黄铜片的表征..9

  3.2线性扫描伏安曲线..12

  3.3不同腐蚀电流密度对黄铜片的溶解能力研究.15

    3.3.1 0.2mol/L硫酸锌溶液数据..15

    3.3.2 0.5mol/L硫酸锌溶液数据..21

4. 0.2MOL/L溶液与0.5MOL/L溶液比较（SEM+金相）.25

 4.1同等电流密度下黄铜片阳极溶解研究..26

5.结论.30

致谢.31

参考文献..32

一．绪论

1.1研究背景

18世纪快结束时，电力和磁性被人们发现，铜合金较好的导电性能可以利用起来，可以把电应用于实际生活，加快了工业和人们生活的发展，并且使铜的应用进入了新的时代。人类社会在向各个方向迈进，比如互联网信息和电气自动化的方向迈进，在人类生活和生产建设中，还有一些新的科学技术上，铜合金的作用越来越明显。目前电子工业的发展，几乎都是用铜合金来作为基础的材料，这情况让铜合金在生产上的应用，得到了更好的发展前提，所以铜既是比较普遍的多功能金属材料，也还是现在高科技发展的重要基础材料。