环保型酸性全光亮镀锡工艺研究
关键词：无甲醛；酸性；全光亮镀锡
Environment-friendly acid tin plating technology was studied
Abstract:Acid bright tin electroplating process is widely used in electronic industry, the common bright tin plating process are formulated as tin plating additives, formaldehyde and formaldehyde is a highly toxic and carcinogenic harm to operators and environment is serious. As people the improvement of environmental awareness, implement clean production, environmental protection acid plating tin technology research is very meaningful. This project requirements through process test and study to determine the best process additive formulation and process conditions, require stable technology has a wide range of current density and produce uniform and detailed light coating and good welding performance, all of them, and to process the various components and process operating conditions and additives formula are discussed.
Key words:Formaldehyde-free; Acid; Tin plating
目录
1引言 1
1.1锡元素的介绍 1
1.2 锡元素在电镀中的应用 1
1.3 镀锡工艺的发展与研究现状 2
1.4 添加剂的介绍 4
1.5 光亮剂的介绍 5
1.6 光亮剂的特点及功效 6
1.7 主要研究的内容 6
1.8 研究达到目标 6
2实验原理 7
2.1 工艺原理 7
2.3 工艺研究方法 9
2.4 镀层性能测试及表征 9
2.4.1 镀层外观的测定 9
2.4.2 镀层厚度的测定 9
2.4.3 镀层硬度的测定 9
2.4.4 镀层硬度的测定 10
2.4.5 镀层内应力的测量 10
3 实验内容 11
3.1 实验主要的仪器和试剂 11
3.1.1 实验材料 11
3.1.2 实验仪器 11
3.1.3 实验试剂 11
3.1.4 实验材料与装置 12
3.2 工序流程 13
3.3 前处理 13
3.3.1除油 13
3.3.2光亮侵蚀 13
3.3.3 酸洗 13
3.4 光亮镀锡 13
3.5 后处理 14
3.5.1 中和 14
3.5.2 除氢 14
3.5.3 涂防变色剂 14
4 实验结果与讨论 15
4.1 实验数据的处理和讨论 15
4.1.1 硫酸亚锡浓度的影响 15
4.1.2 硫酸浓度的影响 15
4.1.3 温度的影响 16
4.1.4 添加剂浓度的影响 16
4.2 镀液性能的测定 16
4.2.1 电流效率的测定 16
4.2.2 镀液的分散能力 17