【摘要】黄铜有非常好的力学性能、导热导电性能、工艺性能与耐腐蚀性能等特点，并且便于钎焊和回收因此被广泛地应用在制造汽车的水箱等等一系列。按照含锌量来分类可分为以下三种：α黄铜、（α+β）黄铜和β黄铜，它们的含锌量分别为35%

以下、36%-46%、46%-50%。黄铜中铜锌含量分别为64%和36%。黄铜的用途非常广泛，可用于制作各种五金制品器具，当锌含量增加到一定程度时，它们可以很好的承受热态加工来制作各种零部件。

在其他学者研究的基础上，通过改变阳极电流密度、改变混合液硫酸铜-硫酸钠的浓度、改变实验温度，来探讨不同条件下黄铜的溶解行为，并采用电化学的方法来研究黄铜的溶解机理，同时还有电镜扫描及金相显微镜表征了黄铜在不同条件下的阳极溶解形貌。赫尔槽内以黄铜片作为阳极，铜片作为阴极来进行实验。在0.5mol/L、1mol/L的硫酸铜-硫酸钠溶液中，在相同的电流下改变通电时间来观察黄铜片的腐蚀情况，再把黄铜片分为10个区域，观察其时间-电压曲线、金相显微镜图和SEM图。为了研究相同电流下不同温度对黄铜腐蚀的溶解形貌进行研究，采用了四种温度（室温、40℃、60℃、80℃）来进行实验分析。

在实验中，腐蚀一直会出现，锌在实验过程中优先溶解，铜在锌之后溶解。我们可以通过改善腐蚀环境或者添加缓蚀剂来抑制黄铜腐蚀，但不是绝对的，不能完全防止腐蚀发生。若能提高黄铜自身抗脱锌能力，才能有效阻止腐蚀。

关键词:黄铜；腐蚀溶解；溶解形貌；电流密度

Study on anodic dissolution behavior of brass in copper- sodium sulfate solution

【Abstract】 Brass has a very good mechanical properties, thermal and electrical conductivity, process properties and corrosion resistance, etc., and it is convenient for brazing and recycling and is therefore widely used in the manufacture of automobile water tanks and so on. According to the amount of zinc can be pided into the following three categories: α brass, (α + β) brass and β brass, their zinc content were below 35%, 36% -46%, 46% -50 %.

The contents of zinc and copper in the brass are 34% and 66% respectively, and the content of copper is more. Brass has a wide range of uses and can be used to make a variety of hardware products. When the zinc content increases to a certain extent, they can withstand the hot processing to make various components.

Based on the studies of other scholars, the dissolution behavior of brass under different conditions was investigated by changing the anode current density, changing the concentration of copper sulfate-sodium sulfate in the mixed solution, and changing the experimental temperature. The electrochemical method was used to study brass. The mechanism of dissolution, as well as electron microscope scanning and metallographic microscopy, characterize the anodic dissolution morphology of brass under different conditions. Using brass as the anode and copper as the cathode, experiments were conducted using Hull cells. In a 0.5 mol/L, 1 mol/L copper sulfate-sodium sulfate solution, the current is changed at the same current to observe the corrosion of the brass plate. The brass plate is then pided into 10 smaller portions to observe the time voltage. Curves, metallographic micrographs, electron micrographs. In order to study the dissolution morphology of brass corrosion at different temperatures under the same current, four temperatures (room temperature, 40°C, 60°C, 80°C) were used for experimental analysis.

In the experiment, brass dezincification corrosion always occurs, and zinc preferentially precipitates during dissolution, leaving porous copper. 黄铜在硫酸铜-硫酸钠溶液中的阳极溶解行为研究:http://www.youerw.com/huaxue/lunwen_204851.html