毕业设计（论文）碳钢化学镀镍工艺研究.docVIP

届本科毕业设计 设计题目：碳钢化学镀镍工艺研究 学生姓名： 所在院系：机电学院 所学专业：机电技术教育 导师姓名： 完成时间： 摘 要 本文主要通过对聚甲基丙烯酸甲酯(PMMA,俗称有机玻璃)表面进行预处理：去应力——除油——粗化——敏化——活化。去应力工艺使有机玻璃表面能均匀金属化，并且结合力良好，这里使用化学的方法进行去应力；有机玻璃表面是疏水的，这使得在其表面进行化学处理发生困难。为了使后面的各项工序顺利进行，除油是必不可少的工序，它可使粗化过程得到最佳效果；有机玻璃表面光滑,虽然经过前面的除油工序表面已无油污,但光滑的表面是无法得到结合力良好的镀层的，因此必须进行粗化处理,使表面失去原来的光泽,变成均匀细致的毛面；敏化的目的是为了在非金属表面建立起以贵金属为核心的催化中心准备条件，因此敏化剂也还是还原剂；在进行活化工艺时，考虑到活化方法的多样性，本实验采用多次试验的方法以选择最优方案。预处理后采用含稳定剂、缓冲剂及络合剂配合使用的低温酸性化学镀的方法,在有机玻璃表面得到镍镀层。该工艺具有沉积温度低(60～70)℃,镀速高,镀液稳定等特点。实验结果表明：该镀层与基体结合力良好，耐磨性、耐蚀性良好。 关键字：有机玻璃,预处理,化学镀,镍镀层。 Abstract In this paper, mainly through the polymethyl methacrylate (PMMA, commonly known as plexiglass) surface pretreatment: to stress - removal - of crude - sensitization - activation. To stress the plexiglass surface of metal can be uniform, and a good combination of power, where the use of chemical methods to stress; plexiglass surface is hydrophobic, which makes the surface for chemical treatment difficult. In order to make the process behind the smooth conduct of the oil removal process is essential, it can be rough process best; plexiglass surface smooth, despite the removal process in front of the surface there is no oil pollution, but the smooth The surface is unable to get a good combination of the coating, and therefore the need for rough treatment, the loss of the original shiny surface, a uniform and detailed hair surface; sensitization is aimed at non-metallic surface in order to establish a precious metals as the core Centre prepared by the conditions, so-reducing agent or agents have, during activation process, taking into account the activation of the diversity of ways, this experiment used several methods to test the optimal choice of programmes. Pretreated with a stabilizing agent, buffer and complexing agent with the use of the low-temperature acidic chemical plating methods, in the plexiglass surface by nickel. The process has deposited a low temperature (60 ~ 70) ℃, plating rate, bath stability and so on. The results