摘要：结合电子扫描显微镜以及金相显微镜分析，采用线性扫描伏安法、赫尔槽实验对黄铜片在硫酸锌-硫酸铜溶液中的阳极溶解行为进行分析。此次实验介质为0.05mol/L硫酸锌+0.2mol/L硫酸铜溶液和0.1mol/l硫酸锌+0.2mol/l硫酸铜溶液。首先通过线性扫描伏安法找出铜锌的溶解电位。之后通过赫尔槽实验，将黄铜片阳极分为十个区域，每个区域的电极密度不同，电解时间分别为5、10、20分钟，找出最佳电解时间与电流密度。在固定电流密度下，在平板电解池中测试不同温度条件下黄铜阳极的溶解，观察阳极溶解后的形貌、组成和结构。线性扫描伏安法的研究表明，以银氯化银为参比电极，铂丝电极为对电极时，在不同的扫描速度下，锌先溶解，溶解电位为-0.1V，铜在-1.2V时开始溶解。当扫描速度过于快时，电压趋势将不再稳定，在锌溶解的时候电压变化快速，急速下降。黄铜片在不同浓度的硫酸锌+硫酸铜溶液中改变电解时间（电解时间分别为5分钟、10分钟、20分钟）的赫尔槽实验研究表面，从赫尔槽实验我们可以看出，当随着电流密度增大，从电子扫描显微镜中可以得出，黄铜表面的锌先溶解，然后铜再开始溶解；从金相图中可以得出的是，随着电流密度的增加，黄铜表面的β相先溶解，然后α相再开始溶解。对比电解10分钟与20分钟电镜图清楚地得到，腐蚀时间越长，腐蚀的程度越高。固定电流密度下，为了得到我们想要的黄铜表面形貌，对赫尔槽实验中得到的黄铜片的电镜图进行分析，选出最佳的电流密度与电解时间，研究不同温度下脱锌腐蚀对黄铜表面的影响。随着温度的升高，黄铜表面的电镜图与金相图呈现出温度越高，黄铜表面腐蚀得越严重。

关键词:黄铜；阳极溶解;线性扫描伏安法

Study of anodic dissolution of brass in the Zinc sulfate copper sulfate solution

Abstract: Electronic scanning microscope and metallographic microscope analysis, USES the linear sweep voltammetry, hull cell test on brass in the anodic dissolution behavior of zinc sulfate, copper sulfate solution is analyzed. The experimental medium was 0.05mol/L zinc sulfate +0.2mol/L copper sulfate solution and 0.1mol/ L zinc sulfate +0.2mol/L copper sulfate solution. First, the dissolution potential of copper and zinc was found by linear scanning voltammetry. After by hull cell test, brass strip anode can be pided into ten regions, each region of the electrode different density, electrolytic time 5, 10 and 20 minutes, respectively, find out the best electrolysis time and current density. At a fixed current density, the dissolution of the brass anode at different temperatures was tested in the electrolytic cell of the plate, and the morphology, composition and structure of the anode after dissolution were observed. Linear sweep voltammetry studies showed that the silver with silver chloride reference electrode, platinum electrode, was under different scanning speed, the zinc dissolve first, dissolve potential of 0.1 V, begin to dissolve copper in 1.2 V. When the scanning speed is too fast, the voltage trend will no longer be stable. When zinc is dissolved, the voltage changes rapidly and drops sharply. Brass plates in different concentrations of zinc sulfate + copper sulfate solution change electrolytic time, electrolytic time respectively for 5 minutes, 10 minutes, 20 minutes) of the surface of the hull cell experiment and research, from the hull cell test we can see that when the current density, can be concluded from the scanning electron microscope, zinc dissolve first, on the surface of the brass and copper again begin to dissolve; It can be concluded from the metallographic that as the current density increases, the phase of the brass surface is first dissolved, and then the phase is changed to be dissolved. It is clear from the comparison of 10-minute and 20-minute electron micrographs that the longer the corrosion time is, the higher the corrosion degree is. Fixed under the current density, in order to get what we want brass surface morphology, the hull cell test in actual electron micrograph of a brass strip were analyzed, and select the best of the current density and electrolytic time, study the dezincification corrosion of the brass surface under different temperature. The higher the temperature, the more corroded the brass surface is.