【摘要】 研究了5,5-二甲基乙内酰脲(DMH)无氰脉冲镀银工艺。结果表明:导通时间、关断时间、平均电流密度对镀层的外观有很大的影响。在最佳工艺参数下得到的脉冲镀层比直流镀层的结晶更致密,择优取向更明显。更多还原

【Abstract】 The process of cyanide-free silver pulse electroplating is investigated in 5,5-dimethyl hydantoin(DMH) bath.The results show that pulse current density,pulse on-time and pulse off-time have a great influence on deposit appearance. And the experimental results also show that under optimal conditions,the crystals of the silver coatings deposited by pulse current are more compact and their preferred orientation is more obvious than those by direct current.更多还原