摘要:本论文首先综述无氰仿金电镀的研究现状和存在问题,提出以焦磷酸盐主络合剂的铜锌锡三元无氰仿金电镀工艺,此工艺是同时符合清洁生产理念和工业应用要求的最佳选择。其次,采用焦磷酸盐Cu-Zn.Sn三元碱性仿金电镀体系新工艺,尝试改进镀液配方,通过正交试验寻求最佳工艺条件。结果表明,无氰仿金电镀成本低于有氰仿金电镀,对工业生产具有显著经济效益。27889 毕业论文关键词:铜锡锌合金;添加剂;工艺条件
Weak alkaline cyanide-free copper-tin-zinc alloy plating process
Abstract: This dissertation started with an overview of non-cyanide gold imitation plating. The problems existed in industrial application were then disscussed.Thus,the major objective in the present study was to explore a novel Cu-Zn-Sn non-cyanide gold imitation plating process. Pyrophosphate was used as main complexing gent in consideration of cleaner production concept and requirements in industrial application. Secondly, orthogonal experiment was performed to explore the optimized operational condition.It can be seen that the non-cyanideprocess had lower cost than the cyanide process.
Keywords: Copper-tin-zinc alloy;additives;process conditions
目录
1前言 1
1.1概况 1
1.2目的与内容1
1.3主要技术要求 1
1.4铜锡锌合金电镀工艺的现状和趋势1
1.4.1含氰电镀仿金2
1.4.2无氰电镀仿金体系2
1.4.3甘油锌酸盐电镀仿金2
1.4.4焦磷酸盐电镀仿金3
1.4.5乙二胺体系3
1.4.6酒石酸盐体系3
1.4.7HEDP体系3
1.5铜锡锌合金电镀工艺的发展趋势3
2工艺技术原理4
2.1工艺原理4
2.2铜锡锌合金镀液中各个组分及其作用原理4
3试验内容5
3.1工艺流程5
3.1.1配制基础液5
3.1.2基础液的组成及其工艺5
3.1.3操作条件6
3.2配方含量的确定6
3.2.1铜含量的确定6
3.2.2锌含量的确定6
3.2.3锡含量的确定7
3.2.4柠檬三钠含量的确定7
3.3工艺条件的确定8
3.3.1温度的影响8
3.3.2电镀时间的影响8
3.3.3电压的影响8
3.4钝化9
3.4.1配置钝化液9
3.5镀层性能检测9
3.5.1镀层外观9
3.5.2厚度9
3.5.3结合力9
3.5.4韧性10
3.5.5镀层结合强度测定10
3.5.6镀层耐蚀性测定10