复合电沉积陶瓷颗粒增强金属基复合涂层研究进展

根据国内外对复合电沉积制备陶瓷颗粒增强金属基复合涂层研究结果，对复合电沉积的基本概念、机理以及复合电沉积方法主要分类进行了归纳和概述，对耐磨、耐蚀和抗高温氧化陶瓷颗粒增强金属基复合涂层进行了分类讨论，重点综述了其组织结构和性能特点及其影响规律等。在此基础上，对复合电沉积陶瓷颗粒增强金属基复合涂层发展前景进行了展望。     

电沉积制备铜基复合镀层的研究进展

兼具工艺成本低、工艺流程简单和工艺柔性好等优势的电沉积技术,是制备单元/多元金属基复合镀层的工艺方法。以电沉积制备铜-非金属化合物复合镀层和铜-金属微粒复合镀层为主题,选取制备工艺、参数条件优化及性能表征等方面作为切入点,分别进行概述。     

电沉积纳米复合镀层的研究现状

纳米复合电沉积是一种新兴的复合表面技术。阐述了纳米颗粒与金属共沉积的机理、工艺条件对纳米复合电沉积的影响。以及纳米复合共沉积的应用。纳米与金属共沉积可明显提高镀层的硬度、耐磨、耐蚀、光催化和电接触性能。指出了纳米复合电沉积现存的问题，并为今后的研究提出了建议。     

电结晶磷酸钙生物涂层表面复合蛋白质方法的研究

采用电结晶共沉积和吸附方法,把与骨形成蛋白等电点相接近的牛血清白蛋白复合到磷酸钙生物涂层表面,ＩＲ和ＵＶ光谱分析表明：相同电注密度下电结晶共沉积法复合的牛血清白蛋白量多于吸附法,大电流密度时电结晶共沉积和吸附法复合的牛血清白蛋白的量高于小电流密度。     

复合电沉积研究的新动向

复合电沉积是获得功能性复合材料镀层的一种新工艺。综述了近年来国内外在复合电沉积研究方面的新动向。重点探讨了多元复合电沉积、纳米复合电沉积、功能梯度材料复合电沉积的研究现状和发展趋势。这三类复合镀层在耐磨性、抗腐蚀性和抗高温氧化性等方面比传统的复合镀层更优越。展望了今后复合电沉积的研究和应用前景。     

复合电沉积的影响因素

根据国内外电沉积金属基复合镀层的研究结果,综述了微粒特性、镀液组成、工艺条件以及其它因素对复合电沉积的影响。提出今后应继续加强在复合电沉积机理方面的研究,以便更深刻、更准确地理解和掌握复合电沉积的各种影响因素,从而更好地对复合电沉积的工艺研究和应用给予指导。     

复合电镀的研究新进展

综述了近年来国内外在复合电镀研究方面的进展。重点探讨了多元复合电沉积、纳米复合电沉积、含稀土复合电沉积、功能梯度材料的复合电沉积的研究现状和发展趋势。资料表明：复合材料镀层的耐磨、耐蚀、抗高温氧化等性能优于单金属镀层或合金镀层。复合镀层在今后的发展中将有更广阔的应用前景。     

碳化硅微粒与铜复合电沉积过程模型试验

应用相似理论于复合电沉积研究中,同时考虑电化学因素和流体力学因素对复合电沉积过程的影响,建立了固体微粒与金属复合电沉积过程的模型。对碳化硅微粒与铜在酸性硫酸铜溶液中的复合电沉积过程,通过实验求出了关联式的有关参数。用导出的关联式关联碳化硅微粒的共沉积量,计算值与实验值吻合较好,误差最大不超过6%。     

聚四氟乙烯改性环氧阴极电泳涂料的研究

通过向环氧电泳涂料中添加不同含量的PTFE乳液，制备了新型低表面能阴极电泳涂料。对混合体系的工艺条件进行了探索，研究了槽液pH值对漆膜性能的影响。IR谱图说明PTFE乳液粒子能与环氧树脂粒子复合电沉积到基材上。水接触角测定结果表明，在环氧阴极电泳涂料中添加PTFE乳液后，电沉积涂层具有低的表面能，TG说明改性后漆膜的耐热性提高。SEM观察涂层发现漆膜表面平整性下降：研究发现，pH值越低，漆膜水接触角越大，漆膜耐热性越好。     

电泳沉积磷灰石生物陶瓷涂层的研究进展

羟基磷灰石(HA)生物涂层材料是最有发展前途的生物硬组织替代材料之一.电泳沉积具有装置简单,操作方便,非线性,沉积温度低等特点,可以解决传统HA生物陶瓷涂层制备工艺上的各种不足.文中探讨了电泳沉积的各种工艺影响因素,综合介绍了国内外有关电泳沉积HA复合(梯度)生物涂层和电泳沉积与其它方法复合制备HA生物涂层的研究报道,进而提出了相应的设想和展望.     

阴极电泳涂料的研究进展

介绍了电沉积的原理,阴极电泳涂料和树脂的特点以及阴极电泳涂料的优越性。概述了国内外阴极电泳涂料的现状,重点介绍了几类目前发展较快的阴极电泳涂料,同时指出了阴极电泳涂料今后的发展趋势。     

电泳漆边角覆盖缺陷研究

介绍了检验电泳漆边角覆盖性的试验方法、电泳及烘干过程中尖端部位涂层的变化,对引起电泳漆边角部腐蚀的原因进行分析,列举了提高电泳漆边角覆盖性的途径。     

阴极电泳涂料与涂装的发展历程及趋势

介绍了国内外电泳涂装应用发展情况,并按泳透力、电泳工艺参数、环保性、涂膜的平滑性、耐腐蚀性等5方面的技术进步状况,推荐将阴极电泳涂料的发展历程暂划分三代。并预测了阴极电泳涂料与涂装的发展趋势。     

Pulse current electrodeposition and corrosion properties of Ni–W alloy coatings

Ni–W alloy coatings were prepared on a mild steel substrate by means of pulse current (PC) and compared to the coatings electrodeposited by direct current (DC). In particular the study dealt with the influence of the frequency using pulse current on the surface morphology while maintaining a constant duty cycle. A constant charge for DC and PC electrodeposition of Ni–W alloy coatings was used. The morphology of the coatings was explored by scanning electron microscopy and the composition of the coatings was analysed by X-ray powder diffraction and energy dispersive X-ray analysis. Corrosion resistance of Ni–W alloy coatings was investigated by potentiodynamic polarization in a chloride medium. The corrosion products were analysed by Raman spectroscopy. It was found that the temperature of the electrolysis affects current efficiency of the DC and PC electrodeposition. The frequency of pulse electrodeposition alters the morphology of the Ni–W alloy coatings. There was evidence of the positive influence of increased tungstate concentration in the electrolyte on corrosion resistance of the Ni–W alloy coatings.     

国内外汽车涂料的研究状况

简要阐述了国内外汽车涂料的研究现状,重点介绍了阴极电泳漆、中涂、面漆等涂料。     

厚膜阴极电泳漆的特点及其发展趋势

厚膜型阴极电泳漆是阴极电泳漆的新一代产品，其膜厚明显高于一般电泳漆。介绍了厚膜电泳漆的特点及其发展方向。     

Electrodeposition of silver–tin alloys from pyrophosphate-cyanide electrolytes

Using cyclic-voltammetric techniques, a pyrophosphate-cyanide electrolyte for the electrodeposition of compact Ag–Sn alloy coatings is investigated. This electrolyte is suited to further investigations on the alloy composition, structure and properties. The electrodeposition of coatings with up to 40 wt% Sn is possible from the investigated complex electrolytes. The alloy surpasses the saturation limit of the silver lattice with Sn and allows the formation of coatings with phase heterogeneity. At high tin content an ordered spatial distribution of different alloy phases on the cathodic surface can be observed. The pattern formation in this system looks very similar to the phenomena and structures observed during electrodeposition of other silver alloys, such as Ag–Sb, Ag–Bi and Ag–In.     

电泳涂料的研究进展

本文简述了电泳涂料的发展史,介绍了电沉积原理及阴极电泳涂料基体树脂类型,同时展望了阴极电泳涂料的发展趋势。     

65Mn表面电喷镀Ni-Co-P/BN复合镀层的硬度分析

利用电喷镀技术在65Mn表面制备了Ni-Co-P/BN复合镀层。借助Design Expert软件进行了电喷镀Ni-Co-P/BN复合镀层的实验设计,并测试了镀层的表面形貌和硬度。根据测试结果,分析了镀层的组成,并研究了电压、镀液温度、两极间隙、纳米BN微粒的质量浓度对Ni-Co-P/BN复合镀层硬度的影响。结果表明:当电压为16V、镀液温度为70℃、两极间隙为1.6mm、纳米BN微粒的质量浓度为8g/L时,可以在65Mn表面制得光亮且致密的Ni-Co-P/BN复合镀层,其硬度较65Mn基体的硬度显著提高。     

Bioactive Calcium Phosphate Coating on Sodium Hydroxide-Pretreated Titanium Substrate by Electrodeposition

This study examined the characteristics of calcium phosphate coatings deposited on a NaOH-pretreated titanium substrate by electrodeposition in a modified simulated body fluid (SBF) immediately after electrodeposition as well as after the coatings had been immersed in the SBF for 5 d in order to determine the effects of a NaOH pretreatment on the bioactive coating prior to electrodeposition. The results showed that a dense and uniform coating that consisted of brushite and hydroxyapatite had formed on the NaOH-pretreated titanium substrate by electrodeposition. This coating had transformed to a bonelike apatite during immersion in the SBF. This was attributed to the increased surface area of the modified titanium formed after the NaOH treatment as well as the Na⁺ ions released from that surface. Therefore, a NaOH pretreatment is recommended as an effective method for preparing a bioactive calcium phosphate coating by electrodeposition.