铜的表面防变色处理+文献综述
本课题旨在研究铜表面防变色处理的方法，不同方法不同配方对铜表面的防变色处理的效果，通过滴定百分之五的硫化钠与滴定百分十的硝酸溶液，分别观察变色的时间与起气泡的时间、来测试防变色效果。最后通过配方的成分，每种成分的含量，以及反应的温度与时间，对镀液进行优化。
得到了如下的实验结果：
(1)铜表面防变色处理的最佳配方是：聚乙烯醇5g/L、苯并三氮唑5g/L。最佳反应温度为65摄氏度，最佳反应时间为10分钟。配方可选择先进行CrO3处理，CrO3的浓度为1g/L，在常温下处理一分钟即可。
毕业论文关键字： PVA；BTA；铜及其合金；防变色
Study on the treatment process of copper surface discoloration prevention
Abstract：Copper has good conductivity, thermal conductivity, plasticity and corrosion resistance, it is widely used in many fields. With the development of industry, air pollution is becoming more and more serious, long-term exposure to air in the copper will be subject to the corrosion of various gases, for scientific workers of a large number of studies, with the surface anti-corrosion treatment, played a certain resistance to corrosive action.
This paper aims to study on copper surface anti color processing method, different methods of different formulations antitarnish treatment effect on copper surface, by titration 5 percent sodium sulfide and titration ten percent nitric acid solution were observed discoloration of the time and bubble up the time, to test anti discoloration effect. Finally, through the formulacomposition, content of each component, and the temperature and time of reaction, the bathis optimized.
The results are followings:
(1) The best formula of copper surface anti color processing is: polyvinyl alcohol 5g/L, benzotriazole 5g/L three. The best reaction temperature is 65 degrees Celsius, the optimal reactiontime is 10 minutes. The formula can choose to CrO3 treatment, the concentration of CrO3 is1g/L, with a minute at room temperature.
Keywords： PVA,；BTA,；copper and its alloys； anti - color
目录
1. 前言 6
1.1 课题的概况及内容 6
1.1 课题研究的内容、目的 7
1.2 课题的主要技术要求 8
1.2.1 无机钝化技术 8
1.2.2 有机缓蚀技术 8
1.2.3 自组装技术 9
1.3.4 其他技术 9
1.3 工艺在国内外的过去及发展趋势 9
2 铜以及其合金防变色技术原理 10
2.1 沉淀型保护膜 10
2.2 吸附性保护膜 10
2.3 钝化膜型保护剂 12
2.4 钝化液中添加剂的组成及作用 12
3 工艺试验研究方法及步骤 14
3.1 工艺试验的方法 14
3.2 工艺流程 14
3.2.1 配制镀液 15
3.2.2 试样前处理 15
3.2.3 浸泡涂装 15
3.3工艺性能测试的方法 15
3.3.2电化学方法 16
3.3.3 通H2S腐蚀法 16
3.3.4 湿热实验 16
3.3.5空气放置法 16
3.3.6 NaCl溶液浸泡法 16
3.4 主要实验材料、仪器、试剂 17
3.4.1 实验仪器 17
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