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依据电位活化理论,研究了超低浓度焦磷酸铜预镀铜电解液,其组成为:0.5 ~ 2.5 g/L焦磷酸铜,150 ~ 200 g/L焦磷酸钾.在该电解液中的阴极钢铁件主要发生水的电解反应,同时,工件表面的氧化膜被还原.经过上述处理后,工件表面镀上一层铜膜,然后按常规焦磷酸盐工艺镀铜.实验表明,镀层与基体的结合力与钢铁件氰化镀铜大体相同. 相似文献
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PE塑料化学镀铜的研究 总被引:2,自引:0,他引:2
采用锉刀实验法和划线划格实验两种镀层结合力测试方法,对化学镀铜层与塑料基体之间结合力的优劣进行了定性评价;通过沉积速率的计算,研究了镀铜时间对塑料化学镀铜沉积速率的影响。结果表明,镀层与基体之间的结合力良好塑料表面可通过化学镀形成铜镀层,且随着镀铜时间的增加,沉积速率增加(30 min内)。镀铜10~15 min时,沉积速率相对较低,而镀铜15 min后,沉积速率急剧增大。 相似文献
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采用循环伏安法和恒电流法研究了铁电极在氰化物电解液中的行为,证实了在阴极过程中电极首先极化至铁表面钝态层的还原,实现了表面的活化;随后极化至金属在活化的铁基体上的电沉积过程。 相似文献
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通过化学镀法,在压电陶瓷基体表面镀上一层合金(Ni-W-P)层,研究镀液各组分和工艺条件对沉积速率、结合强度的影响,通过正交计算,确定以压电陶瓷为基体表面多元化学镀合金层的配方及工艺参数。 相似文献
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无氰镀铜的实验研究与生产应用进展(一) 总被引:1,自引:1,他引:0
分析了基于硫酸盐光亮酸性镀铜体系的钢铁件浸镀铜工艺工业化应用的不可行性,以及浸镀与电沉积相结合的酸性镀铜工艺的特点.介绍了酸铜光亮剂、钢铁件活化原理、无氰碱铜配位荆等研究的最新进展.指出HEDP无氰碱铜镀液具有化学活化作用,以及预浸能提高镀层结合力. 相似文献
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针对小直径钢管镀铜速度提高后存在镀层不牢、光亮度差等问题,对镀铜设备进行了改进,并采用一种环型喷嘴进行喷射搅拌,提出一种新的高速镀铜的工艺流程方案。该方案使镀铜速度提高到150 m/m in,钢管表面镀层致密,牢固,光洁明亮,完全能满足冰箱冷凝器、蒸发器生产用钢管的要求。该方案取得了显著的经济效益。 相似文献
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The optimal plating settings in the pulse-reverse electroplating mode for the non-anomalous plating of Co-Ni deposits (i.e., the metal composition of deposits is equal to that of the plating solutions) from chloride solutions were approached by using experimental strategies including fractional factorial design (FFD), path of steepest ascent and central composite design (CCD) coupled with the response surface methodology (RSM). The potentials and time period of pulse-plating were the key factors affecting the composition of Co-Ni deposits in the FFD study. The two variables were the path of the steepest ascent investigation to approach the optimal conditions for non-anomalous plating of Co-Ni deposits. The effects of pulse-plating potential and pulse-plating time on the compositions of Co-Ni deposits were further examined using a regression model in the CCD study.The variable Ni contents of Co-Ni deposits are caused by metal hydroxide on the deposit surface. After anodic dissolution process, the increasing pulse-plating time and lower pulse-plating potential can remove metal hydroxide and improve Ni ion deposition ratio on the fresh deposit.All Fe-Co deposits were equal to the composition metal ratio of plating bath while pulse-reverse-plating potential included the anodic dissolution process. 相似文献
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钢铁基体上碱性无氰镀铜 总被引:1,自引:0,他引:1
给出了一种钢铁基体上碱性无氰镀铜的工艺配方。介绍了镀液的配制方法和稳定性,并将本工艺与氰化镀铜工艺的深镀能力进行了比较。测试了电流效率、镀层的受热性和结合力。提出了工艺流程中需要注意的问题。结果表明,本工艺的深镀能力优于氰化镀铜工艺,得到的镀层经烘烤和弯曲试验均无脱皮、起泡现象,镀层与基体结合良好。 相似文献
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Plating fog is often observed on the substrate when printed circuit boards are produced by photo-additive electroless plating. Thus unwanted metal is deposited on the unpatterned region, where there should be no plating activity, when a substrate with a catalytic plating pattern is immersed in plating solution. This metal deposition phenomenon observed on roughened resin substrates is examined in terms of (i) the physical state of substrate surface, (ii) the chemical state of substrate surface and (iii) the exposure and activation process. 相似文献