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NaCl—KCl熔融体系电镀钛的研究 总被引:4,自引:0,他引:4
研究了在NaCl-KCl熔融盐体系中进行难熔金属钛的电镀过程中,K2TiF6添加剂的加入量等因素对电镀结构的影响,并对直流电镀、脉冲电流电镀在熔融盐电镀中的应用进行了比较。使用换向脉冲电流电镀的新工艺,在碳钢表面获得了较好的金属钛镀层。 相似文献
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介绍线性扫描伏安法的定量分析原理和电镀工业分析中的应用,利用DD系列电镀参数测试仪中的“极谱”功能进行线性扫描伏安法分析,提供电镀方面定量分析实例。 相似文献
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脉冲电镀应用现状及对策分析 总被引:2,自引:2,他引:0
脉冲电镀具有镀件质量好、生产效率高、节约原材料及环保等优点.分析了单金属电镀、合金电镀在国内企业中的研究及应用现状,研究表明,大型企业由于研发实力较强,脉冲电镀技术应用情况较好,但是,中小企业由于经济实力及技术水平的限制,推广应用还比较困难.指出降低脉冲电源价格、优化普通金属脉冲电镀工艺配方是推动该技术在国内中小企业应用的有效途径. 相似文献
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本文介绍电镀溶液分析新方法——离子色谱法。它具有分析速度快、应用范围广、适应性强等优点,概要介绍了离子色谱分析的原理、特点及其在电镀溶液分析中的应用。 相似文献
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当硼酸供应不足时,作者对镀镍溶液中能否采用其它适合的缓冲剂进行了研究.这里发表的结果表明缓冲剂控制阴极薄膜的PH要比缓冲整个镀液更为重要.本文也讨论到缓冲剂对镀液极限电流密度的影响,以及低PK的缓冲剂对填平型光亮剂的危害性.在低温和鼓动不良时,某些第Ⅰ类添加剂会明显的减少极限电流密度.初步的资料表明正常浓度的硼酸在瓦特镀液中的行为,显示出比它的电离常数所应有的酸度要强. 相似文献
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为了防止钢表面酸性电镀铜出现置换铜,采取在电镀铜前增加化学镀镍工序,研究了化学镀镍工艺对酸性电镀铜的影响。结果表明,化学镀镍时间超过6 min时(镍层厚度>2.5~3μm),工件在酸性镀铜液中浸泡10 min,无置换铜出现。化学镀镍层对后续的酸性镀铜层的表面形貌和附着力均无明显影响,表明化学镀镍可作为钢酸性镀铜的底层。 相似文献
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Nickel electrodeposition from novel citrate bath 总被引:3,自引:0,他引:3
A new type of electroplating bath suitable for nickel electrodeposition was developed. Trisodium citrate was used as a complexing agent and a buffer in the bath. The buffering capacity between trisodium citrate and boric acid were compared. The effects were investigated under different conditions of bath composition, current density, pH and temperature on the potentiodynamic cathodic polarization curves, cathodic current efficiency and throwing index, as well as the electrical conductivity of these baths. The optimum conditions for producing sound and satisfactory nickel deposits were: NiSOn6H2O350 g/L, NiCl2·6H2O 45 g/L and Na3C6H5 O7 30 g/L at pH=4 and 55 ℃. The surface morphology of the as-plated Ni deposit was examined by SEM. The results reveal that the nickel deposition obtained from the optimum conditions are composed of compact, non-porous fine grains covering the entire surface. X-ray analysis shows that nickel deposits obtained from the citrate bath have a fine crystal structure compared with deposits from the Watts bath. 相似文献
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石墨粉表面镀镍工艺研究 总被引:3,自引:0,他引:3
采用电镀法对石墨粉表面进行了镀镍.采用正交试验的方法研究了镀镍过程中阴极电流密度、搅拌间隔时间、润湿剂加入量和吸附剂加入量对石墨粉镀镍效率的影响,并对结果进行了方差分析和信噪比分析,以选取镀镍效率高且稳定的工艺组合.用镀镍石墨粉在浓硝酸中充分腐蚀前后的质量差计算镀镍石墨粉中镍的含量,并以此表征镀镍效率.试验结果表明:吸... 相似文献
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金刚石铰削技术已在现代机械制造工业中起到重要作用。以精密铰刀为例,提出精密孔加工刀具的一种新型设计与制造方法——内包容电镀法,介绍其制造原理与方法,阐述金刚石铰刀高精度内孔模具的设计与制造、内包容复合电镀、内包容旋转流动电镀、开刃与开槽等关键制造技术问题,并说明其铰削工艺技术。 相似文献
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在碱性锌酸盐镀锌基础液中加入自制光亮剂XY-03A,研究成功了一种全光亮碱性锌酸盐镀锌工艺,确定了电镀工艺规范,采用霍尔槽试验探讨了主要成分对镀层质量的影响,检测了镀液和镀层性能,结果表明:所形成的锌镀层光亮度高,镀层结晶细致,与基体结合力好;镀液的分散能力、复盖能力、电流效率和镀层耐蚀性优于DE型镀锌工艺,具有较高的应用价值. 相似文献
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Sara Fazli 《金属精饰学会汇刊》2013,91(2):92-98
Thick foils of nanostructured permalloy were electrodeposited by applying a current density of 100?mA?cm?2 for 48 hours. The bath contained nickel sulphate, iron sulphate, a complex agent, a grain refiner, a stress reducing agent, a buffer and a wetting agent. The bath pH was 3·8. Different parameters were controlled to get thick (approximately 860?µm), uniform permalloy coatings. To investigate the effect of electroplating time on the surface morphology, thickness and structure of foils, scanning electron microscopy, optical microscopy and X-ray diffraction were used. Chemical compositions of foils and the bath were investigated by quantometry and ultra violet–visible spectroscopy. The composition of the coatings was constant during the long period of electroplating, which was attributed to the bath stability. The cathode current efficiency of the electroplated permalloy foils increased slightly on increasing the plating time. Existence of chloride ions, complex agent and saccharin in the bath influenced efficiency. 相似文献
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