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铝及其合金电镀光亮锡-铅合金工艺研究 总被引:1,自引:0,他引:1
研究了采用浸锌-锡合金与预镀镍相结合的方法,在铝及其合金表面形成一层中间层再电镀光亮锡-铅合金工艺。介绍了铝及其合金制件的脱脂、碱蚀、出光及预镀等预处理工艺和配方,探讨了浸锌-镍合金溶液的配制、温度及时间对镀层性能的影响。结果表明,该工艺所获得的镀层结晶细致、光亮、焊接性能高、结合力强。 相似文献
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在介绍电镀Ni-Fe合金镀液组成、工艺条件、镀液及镀层性能的基础上,叙述了复合电镀(Ni-Fe)-金刚石的镀液组成、工艺条件、工艺操作过程、方法及注意事项。用(Ni-Fe)-金刚石复合电镀工艺制造金刚石磨具、刃具,具有很好的应用前景。 相似文献
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镁及镁合金电镀与化学镀 总被引:20,自引:0,他引:20
介绍了镁及镁合金电镀与化学镀工艺流程、浸锌及直接化学镀镍等前处理工艺,以及已应用于镁及镁合金上的各种镀层.同时,对电镀及化学镀在镁及镁合金上的应用和发展状况作了简要评述. 相似文献
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Wenfeng Qin 《Journal of Coatings Technology and Research》2011,8(1):135-139
The microstructure and corrosion behavior of electroless Ni–P alloy plating on 6061 aluminum alloys substrate in an alkaline
plating bath with sodium hypophosphite as reducing agent were investigated. The effects of bath temperature on the plating
rate, compositions, and microstructure of the electroless Ni–P deposits were studied. The results showed that the deposition
rate and the P content of the electroless Ni–P deposits increased with the rise of the bath temperature. Scanning electron
microscopy (SEM) of the deposits showed nodular structure for binary deposits. X-ray diffraction patterns of all the deposits
revealed a single and broad peak which indicated the amorphous structure of the deposits. Corrosion resistance of the Ni–P
coatings was evaluated by potentiodynamic polarization. The results indicated that electroless Ni–P plating could obviously
improve the corrosion resistance of 6061 aluminum alloy. 相似文献
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钢铁件无熔盐覆盖光亮热浸镀铝-一种无污染镀铝新工艺 总被引:1,自引:0,他引:1
提出了一种无污染光亮镀铝工艺。在熔融的热浸镀铝液中添加少量(小于0.1%)抗氧化合金以代替熔盐覆盖。观察了镀铝件的外观、微观结构,并测试了其各项性能,该工艺所得镀铝件光亮洁白,具有优良的耐磨、耐蚀及抗高温氧化性能。 相似文献
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Electrochemical study of electroless deposition of Fe-P alloys 总被引:1,自引:0,他引:1
Gui-Fang Huang Wei-Qing Huang Ling-Ling Wang Yan Meng Zhong Xie B.S. Zou 《Electrochimica acta》2006,51(21):4471-4476
Fe-P deposits were prepared by electroless deposition and the inducing effect of coupled aluminum on Fe-P deposition was studied. The partial reactions of reducer oxidation and metal ions reduction in electroless deposition Fe-P bath were investigated by electrochemical investigation. In situ mixed potentials of the process for electrolytes with different pH were measured. The plating rate of iron alloys was measured gravimetrically and calculated by the deposition current density. The results show that coupled aluminum induces the Fe-P deposition by shifting the potential negatively and decreasing the polarization resistance of anodic and cathodic reaction. The test of the mixed potential theory was performed by comparison between direct experimental values of the mixed potential and plating rate with those derived theoretically from the current-potential curves for partial reactions. Due to the hydrogen evolution, the plating rate determined by electrochemical measurement is higher than the average plating rate determined from gravimetrical measurements. 相似文献
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在第一代钢铁无氰镀铜工艺的基础上,开发出第二代无氰碱性镀铜新工艺,成功地解决了镀液的稳定性问题。镀液的基础配方和工艺条件为:CuSO4·5H2O25.0g/L,C6H5O7K3·H2O0.2mol/L,辅助配位剂0.05mol/L,稳定剂0.2mol/L,活化剂0.02mol/L,H3BO330g/L,KOH20g/L,添加剂10mL/L,温度45°C,pH8.89.2,电流密度1.01.5A/dm2,阳极为电解铜。在新工艺镀液中引入一价铜稳定剂和活化离子,保证了其稳定应用。通过赫尔槽和挂镀试验研究了镀液组分和工艺条件对镀层性能和电流效率的影响,以及镀液的抗杂质能力。结果表明,在本工艺条件下,所得镀层性能良好,电流效率高于90%,镀液的抗杂质性能优良。本工艺适用于钢铁、铜合金预镀铜。经数月的连续生产,镀液保持稳定,产品结合力合格。 相似文献
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介绍了超声波的工作原理,概述了超声波化学镀镍及镍合金、超声波化学镀复合镀层、超声波化学镀银和镀铜等的国内外研究现状,分析了超声波在化学镀中的4个作用:降低镀液温度,提高镀层沉积速度,提高镀层性能,促进微纳米颗粒分散和沉积。 相似文献