共查询到19条相似文献,搜索用时 109 毫秒
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通过对原浸锌工艺的改进及增加表调工序,采用多元合金化的浸锌工艺,提高了锻铝、高硅铸铝表面镀银层的附着力,解决了铝合金镀银质量不稳定的难题。描述了铝基材上电镀存在的问题及原因分析,针对锻铝和高硅铸铝两种材质采用了不同工艺镀银,分别进行了热震、磨削和拉力试验,验证了新工艺提高了镀银层的附着力。 相似文献
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钛合金脉冲镀银工艺实践 总被引:3,自引:0,他引:3
钛合金零件镀银能防止配合面的粘结,避免碰划伤和摩擦起火;简要叙述了脉冲镀银的特性及电化学原理;详细说明了脉冲镀银的工艺过程;通过对比试验,优选了脉冲镀银工艺参数(脉冲频率,占空比,平均电流密度);提出了钛合金脉冲镀银层质量检验方法;实践证明,该工艺操作可行,能用于钛合金零件镀银的批量生产。 相似文献
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针对传统电镀银所使用的氰化物工艺,为解决剧毒氰化物对人类健康、环境造成的危害问题,设计开发了一种新型无氰镀银工艺来代替氰化镀银工艺,研究了双配位体系无氰镀银溶液、无氰浸锌溶液性能及所得镀银层性能影响.结果表明:采用双配位体系络合剂可以提高无氰镀银溶液稳定性,使各项性能达到氰化镀银指标;采用新型无氰浸锌溶液可以提高铸铝件镀银结合力;该工艺的实际应用,避免了氰化物的危害、降低了生产成本、有利于操作人员的身体健康和生命安全,属于绿色生产工艺,符合国家产业政策,极具推广价值. 相似文献
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本文通过一起铝合金镀银生产中出现的镀层起泡问题,研究了铝及铝合金快速镀银工艺对银镀层结合力的影响.通过显微硬度计测量镀银层硬度,表征了镀层起泡的定性特征,通过霍尔槽实验确定了有效的改进措施,优化了快速镀银工艺.结果表明,采用优化后的工艺,镀银层的显微硬度达到了一个合理的数值范围,镀层达到了稳定的合格率. 相似文献
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The feasibility of adherent silver layers onto PET fabrics by electroless plating was explored and its optimal technology for modification and electroless plating was investigated. Morphology, structure, and thermal stability of silver plating PET fabrics were characterized by scanning electric microscope (SEM), X‐ray diffraction (XRD) and thermogravitric (TG) analysis. As the silver weight on the modified fabric is 25 g/m2, the electromagnetic shielding effectiveness (SE) of silver plating PET fabric is more than 30dB at the frequency ranging from 1MHz to 5000 MHz. The results show that the silver plating PET fabric has good electrical conductivity and electromagnetic shielding property. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献
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无氰镀银的工艺与技术现状 总被引:6,自引:3,他引:3
介绍了无氰镀银的发展过程和技术现状。由于表面添加剂技术的进步,使以前开发的工艺中存在的某些工艺或技术问题得到了解决。这些添加剂或者提高了无氰镀银工艺的电流密度,或者提高了光亮度或表面活性,从而使无氰镀银工艺的工业化成为可能。 相似文献
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Huiru Zhang Xinguo Zou Jingjing Liang Xiao Ma Zhiyong Tang Jinliang Sun 《应用聚合物科学杂志》2012,124(4):3363-3371
The development of a conductive fiber with flame resistance is an urgent concern particularly in national defense and other specialized fields. Aramid fibers (para‐ or meta‐) exihibit high strength and excellent fire resistance. Electroless silver plating on para‐aramid fibers and growth morphology of silver deposits was investigated in the present work. The surface of para‐aramid fibers was roughened using sodium hydride/dimethyl sulfoxide to guarantee successful electroless plating. Two complexing agents (ethylene diamine/ammonia) and two reducing agents (glucose/seignette salt) were used for the electroless silver plating bath design. Structure and properties of the resulting silver‐deposited para‐aramid fibers were evaluated based on scanning electron microscopy, silver weight gain percentage calculation, electrical resistance measurement, crystal structure analysis, and mechanical properties test. The results showed that a higher silver weight gain was advantageous to the improvement of conductivity for the silver‐deposited para‐aramid fibers. The obtained silver deposit was homogenous and compact. Electroless silver‐plating deposits were considered to be three‐dimensional nucleation and growth model (Volmer–Weber). Black, silver gray, and white deposits appeared sequentially with progressive plating. The breaking strength of silver‐deposited para‐aramid fibers remained at value up to 44 N. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献