共查询到20条相似文献,搜索用时 109 毫秒
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本文较全面地阐述了日本电镀、化学镀现状及发展动向。在电镀方面着重介绍了电镀的种类和应用以及几种新电镀方法,并重点分析了电镀的发展动向及今后开发的课题,在化学镀方面,详细介绍了应用于电子工业中的导电性镀、薄膜电阻性镀及磁性镀;对以耐磨为目的开发的化学镀也作了详尽的介绍;同时还简介了化学镀液的自动管理系统、化学镀液的再生利用;对化学镀的发展动向也作了较全面的探讨。 相似文献
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介绍了电子产品中轴类零件的化学镀镍工艺。讨论了长轴、短轴和盲孔螺纹零件的化学镀镍方法,提出了提高镍镀层耐蚀性能的措施。 相似文献
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化学镀镍铜磷三元合金沉积工艺的研究 总被引:8,自引:1,他引:7
为提高化学镀镍的硬度、耐磨及耐蚀性,以拓宽在电子工业中应用,采用在化学镀镍磷合金液中添加适量的铜离子制得镍铜磷三元合金。研究了镍离子与铜离子浓度比、次磷酸钠含量、沉积温度对合金镀层沉积速率的影响,利用S-570扫描电镜和H-800透电镀观察了镀层表面形貌和显微组织,通过硝酸腐蚀试验比较了镍磷合金与镍铜镀层的耐蚀性。结果表明,铜的共沉积能明显提高镍磷合金的耐蚀性。 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
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化学镀方法较电镀方法更适合于在微米级颗粒表面镀覆突起的刺状金属镀层。通过调整镀液组成和施镀工艺参数,得出亲水性和化学镀工艺参数是影响人造金刚石表面化学镀镍磷合金形貌的主要因素。结果表明为了确保人造金刚石表面呈现良好的亲水性,实现中应该采用镀液能够很好的润湿与接触;在电镀化学过程中采用铬酸洗液可以实现金刚石表面的活性提高,这一结果对于微纳量级的金刚石顺利电镀非常关键。 相似文献
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Corrosion behaviors of electroless plating Ni-P coatings deposited on magnesium alloys in artificial sweat solution 总被引:1,自引:0,他引:1
Y.W. Song 《Electrochimica acta》2007,53(4):2009-2015
Magnesium alloys are the optimum shell materials for electronic products. These electronic products inevitably contact with the hands of users, and then are corroded by the sweat solution mainly consisting of 0.1% urea, 0.5% NaCl and 0.5% lactic acid. Electroless plating Ni-P coatings can provide protection to the magnesium alloys shell. The corrosion behaviors of Ni-P coatings deposited on AZ91D magnesium alloys in artificial sweat solution were investigated by electrochemical tests and SEM observations. The results indicated that urea acted as corrosion inhibitor. The inhibiting effect of urea was reduced in NaCl solution or lactic acid solution. NaCl and lactic acid were the main corrosive mediums, and their synergistic effect can significantly accelerate the corrosion of Ni-P coatings. 相似文献