锌合金电子元器件多层电镀及镀层性能研究

发布时间：2018-05-25 20:23

本文选题：锌合金 + 无氰镀Cu　；参考：《材料科学与工艺》2015年06期

【摘要】：采用多层电镀技术在锌合金基体上镀Ni-Cu-Ni镀层,研究阳极活化剂、电流密度、镀液温度、p H值及搅拌方式等对Ni-Cu-Ni镀层特性的影响,以无氰镀铜替代有氰镀铜Ni-Cu-Ni多层电镀工艺,通过增加中间Cu层厚度降低整体镀层中贵重金属Ni的用量以实现降低成本、无毒环保的绿色新工艺.研究表明,普通Ni作为打底层,镀酸Cu为中间层,镀光亮Ni作表层,利用镀层电位差及镀层错位效应可有效减少贵重金属Ni的用量,并在保持镀层美观的同时满足防腐等表面处理要求;Ni-Cu-Ni镀层结合力良好,150℃热震及锉刀划痕试验镀层无脱落起皮,镀件耐NSS可达48 h,耐5.0%Na Cl浸泡可达100 h.
[Abstract]:The effect of anode activator, current density, bath temperature, P H value and stirring mode on the properties of Ni-Cu-Ni coating was studied by plating Ni-Cu-Ni coating on zinc alloy substrate by multilayer electroplating technology. The cyanide free copper plating was used to replace the Ni-Cu-Ni multilayer electroplating process with cyanide copper plating, and the use of the thickness of the middle Cu layer to reduce the value of the precious metal Ni in the whole coating was reduced by increasing the thickness of the middle Cu layer. A new green process for reducing cost and innocuous environmental protection is carried out. The study shows that the ordinary Ni as the bottom layer, the plating acid Cu as the middle layer and the bright Ni as the surface layer, can effectively reduce the amount of the precious metal Ni by the potential difference of the coating and the dislocation effect of the coating, and meet the surface treatment requirements of the anticorrosion, while keeping the coating beautiful; Ni-Cu-Ni coating The bonding force is good, the thermal shock at 150 degree and the scratching test of the file can not peel off the coating, and the NSS resistance of the plating piece can reach 48 h, and the resistance to 5.0%Na Cl soaking can reach 100 h..
【作者单位】：兰州理工大学石油化工学院;
【分类号】：TG174.4

【参考文献】