共查询到19条相似文献,搜索用时 93 毫秒
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对电池钢壳滚镀镍工艺进行严格的控制,以达到降低生产成本、提高产品质量的目的。对比了电池钢壳滚镀镍一步法、二步法及三步法,得出二步法在工艺上容易控制与管理。介绍了电池钢壳滚镀镍前处理工艺控制、电镀工艺控制(包括温度、时间、电流、镀液pH、回收槽pH及补水方式的控制)及后处理工艺的控制(包括漂白、中和、防锈、脱水及烘干),其中电镀后处理工艺控制最为重要。 相似文献
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介绍了一种近中性(pH=5.5 ~ 6.0)滚镀镍工艺,其镀液由硫酸镍、氯化镍、硼酸、开缸剂、柔软剂、主光剂和润湿剂组成.用于锌合金滚镀时,工艺流程主要包括机械或化学除油、活化酸盐活化、预镀碱铜、硫酸活化、镀中性镍和离心机烘干;用于铝合金时,工艺流程主要包括热浸除油、酸活化、一次浸锌、硝酸退锌、二次浸锌、镀中性镍和烘干.给出了各工序的工艺条件及日常维护、故障处理的方法,对比了该中性镀镍液与普通光亮镀镍液对锌杂质的容忍度.采用该中性镀镍工艺可在锌、铝合金工件上获得有亮丽金属光泽的镀镍层,既提高了成品率和生产效率,又节省了生产成本. 相似文献
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本文研究开发了一种组合型滚镀镍添加剂(N-100)及其电镀工艺.并对其镀液镀层性能进行了全面测试,与英国名牌滚镀镍专用添加剂进行对比.结果表明,两者性能基本相同,N-100的镀液分散能力、复盖能力、抗杂质能力和镀层孔隙率稍优;英国名牌滚镀镍添加剂的发光性能和整平能力略好.N-100的特点是在低D_k区出光速度快、镀液稳定性好,大处理周期长,耗镍量低,视零件而异,每吨滚镀件耗镍量为4~10公斤.此添加剂经历了两年来的大生产考核,性能稳定. 相似文献
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对一次由除锌剂引起的滚镀光亮镍故障进行了分析,并总结了处理方法.生产实践表明,在滚镀光亮镍的过程中,过量使用除锌剂会导致锌杂质的电沉积速率变慢,造成镀液中锌杂质的积累.向镀镍槽中加过硫酸钠破坏除锌剂,并加1~2g/L活性炭吸附,最后用电解法去除镀镍溶液中的锌杂质,可消除除锌剂的不良影响. 相似文献
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0 概述 服装配件、文教用品等小五金零件,长期以来都采用滚镀镍工艺.由于镍板涨价,成本上升,而电镀加工费却很低,有些工厂采用厚铜薄镍工艺,缩短镀镍时间,影响了产品质量; 相似文献
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0前言随着经济和电子技术的发展,电器、电子等需要电镀的配件日益增多。同时,由于滚镀镍生产效率高,镀层光亮、耐磨,经后处理后能得到符合要求的产品,所以,滚镀镍得到了广泛的应用。但其工艺条件控制合适与否直接影响产品的质量,黑白圈的产生是常有的质量问题。 相似文献
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滚镀光亮镍存在的一些问题,需要在生产过程中才能发现并得以解决。总结了维护滚镀光亮镍镀液的经验,分析了镀液性能以及工艺参数对生产成本的影响。选用分散能力高的镀液是降低镀镍成本的有效措施。提高镀液的导电性,采用较低的电压并增加阳极面积,在较低温度和较高pH条件下施镀,可以降低光亮剂的消耗,提高镀液的稳定性。 相似文献
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介绍了一种容积约为200 mL的微型密闭滚筒的设计,其主要包括以下部件:丙烯酸管(长60 mm、外经76 mm、壁厚3 mm)及两侧圆盘,不锈钢中轴,不锈钢阴极棒、镍阳极盘,特富龙套筒、螺帽和滑轮.采用该滚筒对2 g化学镀镍后的人造金刚石颗粒(粒径为100~250μm)进行滚镀镍.化学镀镍前,人造金刚石颗粒按如下步骤前... 相似文献
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手电筒开关小零件电镀过采用电镀氰化锌铜合金然后挂镀铬的工艺,生产效率低,三废治理费用大。采用滚镀镍再滚镀锡钴锌代铬镀层的方法,可克服上述缺点。测试了组合镀层的耐蚀性和耐磨性能,阐述了代铬镀液维护和故障排除方法。 相似文献
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阐述了化学镀铜的反应机理,介绍了化学镀铜在制作线路板、钢铁件打底、化学镀镍封孔等方面的应用,总结了镀液中各种成分的作用. 相似文献
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Statistical Determination of Plating Process Variables for Multilayer Ceramic Chip Capacitors 总被引:1,自引:0,他引:1
Doug A. Benm Carol J. Feltz Richard Haynes Steven C. Pinault 《Journal of the American Ceramic Society》1989,72(12):2279-2281
The effects of the following barrier layer plating process variables on reliability of multilayer ceramic chip capacitors are discussed: media type, nickel plating thickness, lead concentration, pH, tin plating current density, number of capacitors, and percent loading of the plating barrel. The dielectric was formulated from a lead magnesium niobate material. Evaluations were done with respect to capacitance, dissipation factor, conductance, dry life (temperature bias) test, solderability (with and without steam aging), and voltage surge test. Several of the in-process variables studied were found to have a statistically significant effect on some of these response variables. The data indicate that the most significant inprocess parameters in the barrier layer process, of those included in this study, are media type and percentage loading of the barrel. Variables of marginal significance are number of capacitors, lead in the bath, and tin plating current density. The other variables had no discernible effect on the response variables studied. The presence of such a large experimental error in life test was a significant outcome of the study and indicates a need for further study on means of obtaining reproducible life-test results after plating. 相似文献
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C. A. Loto 《SILICON》2016,8(2):177-186
The operating process, versatility and the increasing research interest in optimising the process and products technology in the electroless plating method of metal coating, particularly, the electroless nickel plating of metallic substrates such as mild steel, necessitates the writing of this review. It is also aimed at providing more literature information, both of the past and the present published research in this field. In this paper, electroless nickel plating is introduced. The various nickel plating solutions and baths’ operating parameters; main types of electroless nickel plating; the mechanism involved in the plating process; application of the nickel plating process to iron powders; advantages and disadvantages and the process’s other applications are reviewed. Electroless nickel plating produces an amorphous deposit in the as-plated condition. The deposit is not dependent on current distribution and hence it is almost uniform in thickness. Electroless nickel plating is far more difficult to remove chemically than conventional nickel deposits due to its superior corrosion resistance. The deposit has a good wettability and is generally hard. However, its bath control is more complex than with electroplating. The bath also has lower efficiency and higher operating costs, even without the use of electricity. 相似文献