电极三元涂层的改进

介绍了改进的钌钛锡三元涂层结果。改进的三元涂层放氯过电位降低，达到比标准低２０ｍｖ，放氧电位比原工艺制的电极提高１００ｍｖ。改进的方法只是变更制备工艺，电极成本不变。     

金属阳极四元涂层开发现状浅析

通过分析金属阳极涂层结构，在现有金属阳极三元涂层的基础上，确定了钌、钛、铱、锡四元涂层。对该涂层的电化性能指标及实际运行数据进行了分析，并与三元涂层电化性能指标进行对比，说明了四元涂层在析氯电位、极化率、析氧电位、寿命等方面均明显优于三元涂层，而且更适合在高电流密度下运行。     

热处理气氛及气流速度对钌钛氧化物阳极性能的影响

在不同的热处理气氛与气流速度下制备了钌钛氧化物金属阳极，测定了电极的析氯电位、析氧电位及强化寿命。并对涂层进行ＸＲＤ与ＳＥＭ分析。实验表明，改变热处理气氛与气流速度可使电极表面边界层中的氧含量发生变化，直接影响金属氧化物电极涂层的微观形貌，结构与组成，从而导致电极析氧活性与强化寿命的改变。热处理时，在边界层中保持较高的氧含量有助于充分形成钌钛氧化物固溶体，提高金属阳极的析氧电位与工作寿命。     

电解法生产氯酸钠的阳极研究

分别用钛基铱钽、铱钽锡、二氧化铅和钌钛电极作阳极,测定了它们在强酸性条件下强化电解生命,以及电解生产氯酸钠的阳极电极电位、槽电压和电流效率,比较了４种电极作为电解法生产氯酸钠阳极的优劣。     

含稀土化合物的金属阳极涂层研究（II）

介绍在金属阳极钌钛涂层中掺杂少量稀土配合物的十二种新涂层。其中掺杂Ｙ、Ｌａ、ＰｒＴｂ甘氨酸配合物的涂层不仅具有与钌钛涂层相同的析氯电位，而且还具有较高的析氧电位和较好的抗氧腐蚀性能。     

热处理气氛及气流速度对钌钛氧化物阳极性能的影响

对在不同热处理气氛与气流速度下制备的钌钛氧化物金属阳极，进行了电极的析氯电位、析氧电位及强化寿命的测定，并对涂层进行了ＸＲＤ与ＳＥＭ分析。     

含稀土化合物的金属阳极涂层研究（Ⅱ）

介绍在金属阳极钌钛涂层中掺杂少量稀土配合物的十二种新涂层。其中掺杂Ｙ、Ｌａ、Ｐｒ、Ｔｂ甘氨酸配合物的涂层不仅具有与钌钛涂层相同的析氯电位，而且还具有较高的析氧电位和较好的抗氧腐蚀性能。     

少用钌涂层金属阳极的研究

本文对含有少量钌的锡-锑金属阳极涂层进行了研究,发现该涂层在电化学性能上优于石墨阳极,接近钛-钌金属阳极(D.S.A),同时具有较长的寿命。对以本涂层制造的金属阳极取代石墨阳极在技术上进行了初步探讨。     

钌钛金属阳极涂层改进的途径探讨

本文探讨了金属阳极在制备过程中由于采用二氧化钛作为粘结剂，受制备条件制约所选用原料钛的形式导致钌钛阳极在使用过程中暴露了致命的弱点。即耐腐蚀性较差的组份被溶出，纵横深入使涂层形成空隙层以致最后变成空壳附在钛基体上，导致阳极完全钝化。依此机理探讨钌钛涂层改进的途径。本文通过对比各种元素与钌钛元素的相似性，提出锡、锆、铅、铌、钽氧化物用以代替钛氧化物并对其部分技术有所透露。     

金属阳极涂层次品的处理和再生

自从H.Beer发明钌钛涂层不溶性金属阳极以来~[1],给电化学工业带来了巨大的变革。我国从70年代开始研究这种技术后~([2.3])钛在电化学工业方面得到了迅速推广和应用。目前氯碱生产中使用的阳极绝大部分都是不溶性金属阳极,取得了良好的经济效益和社会效益。国内大多数金属阳极的生产和使用多为钌钛二元和钌钛锡或钌钛铱三元涂     

Fracture Characteristics and Damage Evolution of Coating Systems Under Four‐Point Bending

The fracture and damage behaviors of ceramic coating/alloy substrate systems under four‐point bending were investigated using a scanning electron microscope to observe in situ tests. Both the thin and thick coatings fractured by tensile instability at the pure bending sections, and multiple transverse cracks that were vertical to the interface occurred in the coatings. The average crack spacing was greater for the thick coatings than for the thin ones. A catastrophic failure model was developed to explain the damage evolution behavior of the coatings. The damage was found to increase sharply near the failure point.     

W、Cr纳米颗粒对Ni镀层析氢性能的影响

用脉冲电沉积方法制备Ni、Ni-5Cr、Ni-5W及Ni-5W-5Cr纳米复合镀层,比较其析氢性能。采用X-射线衍射和扫描电子显微镜对镀层表面进行观察和结构表征,通过阴极极化曲线和交流阻抗谱图测定镀层的析氢性能,同时对纳米镀层的析氢机理进行了探讨。结果表明,W、Cr纳米粒子沉积于镀层中,细化了镀层的晶粒尺寸,使镀层更加致密均匀。在1 mol/L NaOH溶液中,Jκ为0.01 A/dm~2条件下,Ni-5W-5Cr纳米复合镀层析氢电位与Ni、Ni-5Cr和Ni-5W镀层相比,分别降低了250、200和150 m V,其阻抗值最小为647.9Ω,表明具有较高的析氢活性,说明Ni-5W-5Cr纳米复合镀层的析氢性能最好。     

氢析出电压对污泥中Zn和Cu去除效率影响研究

主要研究电动力学去除剩余污泥中重金属。研究表明电极面积增大、电极间距减小对氢析出电压影响不大。当外加电压等于或小于氢析出电压时,相比采用高于氢析出电压时,剩余污泥中Zn和Cu的去除率分别提高了18.32%和18.75%。采用外加电压等于或小于氢析出电压时,电极面积增大4倍,电流由1.6 mA增大到2.55 mA,剩余污泥中Zn和Cu去除率分别提高了12.97%和16.44%。外加电压等于或小于氢析出电压时,电极间距由32 cm减小为8 cm,电流由1.5 mA增大到1.7 mA,相应剩余污泥中Zn和Cu的去除率分别提高了4.52%和6.06%。     

The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition

Effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating produced by hot filament chemical vapor deposition (HFCVD) process was studied. Annealed sheets of 316L stainless steels were used as the substrate. HFCVD technique, with substrate temperatures of 400 and 500°C, was used to deposit tungsten carbide coating on these sheets. Field Emission Scanning Electron Microscope (FE‐SEM) was used to study the evolution of microstructure. X‐Ray Diffraction spectroscopy was used to analyze the phases formed and Raman spectroscopy was employed to differentiate molecular composition of the coatings. The amount of the porosity of the coatings was measured and Vickers hardness measurement was used for hardness assessment. Results show that the tungsten carbide coatings have a honeycomb structure and increasing the temperature of the substrate increases the amount of porosity of the coating. XRD results showed that 3 different crystalline structures containing W, WC, and W₂C were formed in the coating deposited on the 316L stainless steel. Increasing the temperature of the deposition has increased the intensity of the peaks in the XRD results. Raman spectroscopy results indicated the presence of a carbon in the tungsten carbide coatings. Finally, microhardness of the tungsten carbide coating increases with increasing the temperature of the substrate.     

低能电子束辐射固化涂料的研究

以低能电子束处理多种配方的涂料,研究了辐射剂量、加速电压和氧气浓度对涂料固化性能的影响。结果表明：氧气浓度高于一定程度时将会导致涂层固化困难,辐射剂量对涂膜性能有着直接的影响,较高的加速电压有利于较厚涂层的固化。并对EB固化与UV固化后的涂膜性能进行了对比测试,表明EB固化涂料在性能上存在明显的优势。     

Preparation and tribocorrosion performance of CrCN coatings in artificial seawater on different substrates with different bias voltages

The CrCN coatings have been prepared by multi-arc ion plating technology with different bias voltages on 316?L, TC4 and H65 substrates, respectively. The prepared CrCN coatings have been characterized by XRD, SEM, and EDS, respectively. The mechanical properties, electrochemical corrosion behavior, and tribological performance of prepared coatings were tested by microhardness tester, scratch tester, electrochemical workstation, and friction and wear tester, respectively. Results show that the CrCN coatings with bias voltage of ?50?V presented the finer grain size, denser structure, better comprehensive mechanical properties and friction, and better corrosion resistance than the CrCN coatings with a bias voltage of ?30?V. The coating on TC4 substrate show the lower hardness, the better adhesion, the better electrochemical properties and tribological properties than that on 316?L substrate. The coatings based on H65 Cu substrate presented the worst electrochemical and wear properties. The CrCN coating with a bias voltage of ?50?V on TC4 substrate is an optimal candidate in artificial seawater for tribocorrosion.     

电压对镁合金微弧氧化膜层耐高温性能的影响

通过电压参数的调节在AZ91D镁合金表面制备了不同结构的微弧氧化膜层,分析对比了450℃条件下加热96 h后不同电压条件下制备的膜层的形貌变化,结果表明：随着电压的升高,微弧氧化膜层疏松程度变大,高温氧化实验后膜层表面形貌变化减小,膜层耐高温性能提升。     

二元镍基合金镀层析氢性能的研究

通过电镀、化学镀及复合镀的方法,制备了Ni—S、Ni—P、Ni—Mo、Ni—W、Ni—Co、Ni—WC及Ni—ZrO2等一系列二元镍基合金镀层及复合镀层,并通过阴极极化曲线测试,比较了它们的析氢性能。从元素电子结构及元素电负性方面对合金元素的作用进行理论分析,初步探讨了镍基合金镀层的电催化机理。     

离子束加速电压对真空电弧沉积Ti(C,N)涂层性能的影响

利用等离子辅助真空电孤沉积技术分别在高速钢片和单晶硅片制备了Ti(C,N）涂层，通过X-射线衍射和扫描电镜研究了不同离子加速电压对单晶硅片上涂层结构和组织形貌的影响，并测定了高速钢片上涂层的显微硬度，同时进行了耐磨性实验。结果表明：涂层主要由TiN和Ti(C,N）组成，随着离子束加速电压的增大，涂层的沉积速度增大，Ti(C,N）的衍射峰不断宽化，晶格尺寸发生变化，但其表面形貌不受影响；当离子束加速电压为1500V时，涂层有较高的耐磨性和显微硬度，当离子束加速电压为2500V时，涂层的耐磨性和显微硬度都有所下降：     

防腐变压器的涂装

介绍了防腐变压器的涂装工艺过程, 分析了影响涂装质量的各因素。