上海大学成功研制出含氟重防腐涂料

上海大学日前研制出一种含氟重防腐涂料,该涂料采用环氧乙烯基树脂、甲基丙烯酸六氟丁酯、甲基丙烯酸酯、稀释剂和引发剂构成,兼具了环氧树脂类涂层优良的附着力和氟碳涂层良好的化学耐腐蚀性能特点,同时通过不断的技术创新与改进,该涂层产品已具备了极端环境下的化学耐腐蚀能力。此外,该涂层产品具备与氟碳涂层同样优异的耐候能力,与环氧树脂涂层同样优良的附着力,平均高出环氧树脂涂层和氟碳涂层近100℃的使用温度等。     

树脂鳞片衬里专用底涂层粘接强度的检测与评价

本文对涂层附着力的形成、影响因素、检测方法等进行了阐述和分析，对目前在FGD系统的鳞片衬里中常用的几种专用底涂层进行了粘接强度的检测和对比筛选，提出了涂层附着力应采用在线定量的检测方法。     

高分子涂料的防穴蚀性能

研制了一种高分子防穴蚀涂料 ,用多种实验手段证实了其具有优异的抗穴蚀性能。这一作用是基于涂层本身优异的抗穴蚀性能以及与基体金属良好的附着力。固化剂、成膜树脂的比例均对涂料性能有显著影响。     

压铸镁合金有机涂层的技术经济评价

对比测试了丙烯酸、环氧树脂、有机硅、陶瓷有机硅和氟碳树脂等5种有机涂层在镁合金压铸件上的附着力、铅笔硬度、光泽度以及耐盐雾性能,并对各涂层工艺进行了经济成本核算和技术经济评价。结果表明,不同的有机涂层具有不同的技术经济特性。环氧树脂涂层在腐蚀防护上具有显著的技术经济优势;陶瓷有机硅涂层和氟碳树脂涂层在硬度、光泽度方面性能突出,但耐蚀性一般且成本高,技术经济特性一般;有机硅涂层各项性能适中,且成本低廉,经济性能较好;丙烯酸树脂涂层成本低廉,但耐蚀性能差,制约了涂层的应用,缺乏技术经济优势。     

常温固化耐高温400℃的有机硅-聚硅氮烷涂料

目的实现有机硅树脂的室温固化并提高其耐热性,从而制备室温固化耐高温涂层。方法以硅羟基为活性官能团的有机硅树脂作为主体树脂,选择自制的聚硅氮烷作为固化剂,添加碳化硅和玻璃粉等耐热颜填料,制备一种室温固化的有机硅/聚硅氮烷耐高温涂料。采用红外光谱扫描仪和热失重分析仪分别对树脂的固化过程和耐热性能进行表征。加入填料后,对固化后涂层的铅笔硬度、抗冲击性、柔韧性和耐高温性能进行评价。采用金相显微镜对热处理后的涂层形貌进行观察。结果硅树脂和聚硅氮烷在室温下混合反应72 h后,涂覆层硬化成膜,其红外谱图中N—H的弯曲振动峰消失,归属于Si—N的吸收峰强度呈减弱趋势,证明了二者之间发生了化学反应。随着聚硅氮烷加入量的增加,样品热失重率减小且残重增加,其中加入32.5%聚硅氮烷的固化物样品,400℃的失重率仅为0.76%,失重5%时的温度高达500℃以上。固化后涂层的附着力为0级,柔韧性为1级。热处理后,涂层表面的平整度变好,附着力明显提高。结论聚硅氮烷不仅能常温固化硅树脂,改善其附着力,而且明显提高了有机硅树脂的耐热性。基于聚硅氮烷固化有机硅树脂制备的涂层具有良好的柔韧性和耐高温特性,最高耐温达到400℃以上。     

抗空泡腐蚀涂层

该涂层由化工部海洋化工研究院开发。涂层由两种专用涂料所组成:一种是用于钢铁基材表面具有极佳的附着力并有良好弹性的带有     

水环境下环氧粉末涂层的吸水性和湿附着力同步测定初探

利用差示扫描量热仪（DSC）、涂层吸水率以及涂层湿附着力等测试方法评价了三种不同体系的环氧粉末涂层在蒸馏水和3.5wt%氯化钠溶液中的抗水渗透性和抗脱层能力。研究了涂层钢板法和自由膜法两种测定涂层吸水性方法的精密度和准确度。并对不同配方和实验温度下采用涂层钢板法同步测定涂层吸水性与湿附着力的关联性进行了探讨。     

一种吸湿固化可剥离耐腐蚀封存涂料

以多异氰酸酯和聚醚多元醇为基本原料合成了一种以吸湿固化为成膜机理的有机高分子树脂，添加复合缓蚀剂、抗氧剂、紫外线吸收剂和流平剂等助剂，研制了一种可剥离涂料。涂层性能检测结果表明，该涂料在高湿度下可快速成膜，具有良好的介质阻隔性能、耐腐蚀性能和易剥离性，可应用于零部件表面的临时性贴体防护。     

有机硅自润滑组分对自抛光涂层防污、减阻性能的影响

目的 制备一种兼具海洋防污和流体减阻功能的绿色海洋装备防护涂层。方法 将长链线型有机硅自润滑组分化学键合到自抛光黏结树脂中,与一定的无机填料复配,通过喷涂的方法制备了具有自润滑特性的自抛光防污减阻涂层。通过铅笔硬度测试、抗冲击测试、划格法附着力测试、涂层柔韧性测试、三维轮廓测试、表面接触角表征和固–液摩擦测试,分别评价了涂层的硬度、抗冲击性、附着力、黏弹性、表面粗糙度、表面润湿性能和自润滑特性,并通过抗蛋白和海藻黏附、海洋挂片试验和旋转流变仪分别表征了涂层的防污、流体减阻性能。结果 随着涂层黏结树脂中有机硅自润滑组分含量增多,涂层的硬度由2H变为4B,结合力由0级变为2级,涂层的抗冲击性能略有下降,接触角由65°上升至92°,涂层的表面粗糙度均小于500nm,但涂层的自润滑性质、防污性能和减阻性能却不断增强,摩擦因数（干磨）由0.119下降为0.075。当有机硅质量分数超过20%时,涂层的防海藻黏附效率达到97%,减阻率达到10%以上。海洋挂片进一步证明涂层具有优异的综合防护性能。结论 长链线型有机硅虽然一定程度上降低了涂层的硬度和附着力,但由于其特殊的性质,可在满足实际工况需求的前提...     

PPS/SiO2纳米复合涂层抗冲蚀磨损特性研究

采用了附着力测定仪、冲击试验器、冲蚀磨损试验机等手段，对钠米复合涂层、普通涂层的附着力、耐冲击性和抗冲蚀磨损性能进行了研究。探讨了无机物颗粒形态和尺度等因素对两种涂层抗冲蚀磨损性能的影响。结果表明，由于纳米粒子的增强、增韧效果明显，使得纳米复合涂层比普通涂层具有更好的抗冲蚀磨损性能。     

The adhesive behaviour of NiCrAlY coatings with Cr-O-N diffusion barriers

采用电弧离子镀技术制备了不同成分的Cr-O-N薄膜作为NiCrAlY涂层与高温合 金基材DSM11之间的扩散阻挡层. 研究了不同O2和N2流量对Cr-O-N薄膜的相含量的影响及 对NiCrAlY/Cr-O-N/DSM11体系薄膜结合强度的影响. 实验结果表明,Cr-O-N是 由Cr2O3和CrN组成的多晶膜, 两相的相对含量随O2和N2流量改变而发生变化. 扩散阻挡 层抑制元素扩散的同时降低了NiCrAlY涂层与基体间的结合强度, 且随着阻挡层中氧含量 的增加结合强度逐渐下降. 适当的氧含量可以使NiCrAlY/Cr-O-N/DSM11涂层体系具有良 好的结合强度和抗元素扩散能力.     

磁控溅射沉积银薄膜/涂层的研究进展

银薄膜/涂层是一种在高新技术领域极具潜力的新材料,近年来在现代工业中得到了广泛的应用。采用磁控溅射制备的银薄膜/涂层具有优异的附着力,通过选择相应的沉积参数可以实现对银薄膜/涂层微观结构及性能的调控。本文综述了磁控溅射沉积银薄膜/涂层的主要制备工艺,评述了银薄膜/涂层在其主要应用领域内的研究进展,并对其未来的发展进行了展望。     

Improvement of a-C:H film adhesion by intermediate layers and sputter cleaning procedures on stainless steel, alumina and cemented carbide

The adhesion of amorphous hydrogenated carbon (a-C:H) films deposited in a radio frequency (r.f.) plasma discharge on stainless steel, alumina and cemented carbide with different intermediate layers (Ni, Ti and TiC) and sputter cleaning procedures was studied. The composition of the carbon films and the intermediate layers as well as the interface between the coating and the substrate was determined by secondary ion mass spectroscopy (SIMS). The adhesion experiments were carried out using a scratch tester. Tested specimens were also studied by scanning electron microscopy (SEM) to reveal the morphology of the coatings and the scratches.

Without any intermediate layer, the a-C:H coatings generally had insufficient adhesion to the substrate materials studied. For stainless steel and cemented carbide substrates, the TiC intermediate layer and, for alumina substrates, the titanium intermediate layer gave the best adhesion values evaluated by the scratch test. Also, the sputter cleaning of the substrates prior to deposition was necessary for sufficient adhesion of the coating. The intermediate layers also change the failure mode of the coating in the scratch test in some cases.     

离子注入对TC4钛合金TiN/Ti涂层结合力和抗砂尘冲蚀性能的影响

目的通过离子注入提高TiN/Ti涂层的结合力和抗冲蚀性能。方法先采用金属蒸气真空弧(MEVVA)离子源在TC4基体上分别注入四种离子(Mo、Ti、Nb、Co),再用磁过滤真空阴极弧(FCVA)技术制备TiN/Ti涂层。采用非球面测量仪、AFM、XRD和纳米压痕仪,对四种离子注入的TC4基体表面粗糙度、表面形貌、物相结构、纳米硬度和弹性模量进行表征,采用划痕仪测量涂层的结合力,采用涂层冲蚀考核平台对不同试样进行砂尘冲蚀性能试验。结果经过Mo、Ti、Nb离子注入的TiN/Ti涂层的结合力和抗冲蚀性能都有提高,其中Mo离子注入的TiN/Ti涂层的结合力达71 N、耐冲蚀时间为80 min,与未离子注入涂层相比,分别增加31.5%和77.8%,而平均冲蚀率降低39.5%,仅为0.0078mg/g。Co离子注入的TiN/Ti涂层的结合力仅为40 N,平均冲蚀率增大了19.0%,达0.0433 mg/g,其抗砂尘冲蚀性能明显下降。结论离子注入涂层的抗砂尘冲蚀性能与结合力密切相关,随着结合力的增大,TiN/Ti涂层的平均冲蚀率减小,其耐冲蚀时间增加,选择合适的离子注入可提高TiN/Ti涂层的抗冲蚀性能。     

Studies on the Surface Treatment of Aluminium and Zinc

Comparative corrosion and adhesion tests have demonstrated the value of chemical surface treatments for improving the bare corrosion resistance and adhesion of paint to zinc and aluminium. Recent developments have enabled architectural green coatings to be produced on aluminium with consistent colour and chromate-fluoride coatings to be applied on high speed strip lines. It is now possible to correlate the colour of Chromate coatings on zinc with the ratio of the hexavalent chromium to the other anion present; best results are obtained when this anion is sulphate. Yellow Chromate films of very good protective power can be produced from comparatively dilute solutions. Colourless Chromate films can also be obtained from these solutions by adding ammonium sulphate to the processing solution.     

硬质合金金刚石涂层的附着性能

将表面低Co含量(Co含量≈0.38wt%)的硬质合金基体在微波等离子体化学气相沉积装置中进行金刚石涂层,用扫描电镜(SEM)对金刚石涂层进行形貌分析,用EDAX确定硬质合金表面Co的含量,用压痕法和划痕法评价金刚石涂层与基体间的附着性。研究结果表明:不同厚度的金刚石涂层均具有良好的晶型。虽然涂层厚度增加,但是基体表面Co含量较少,是形成涂层/基体附着性能良好的主要原因,6μm的金刚石涂层具有较好附着性能。     

离子渗氮对Cr12MoV表面CrNiTiN镀层耐磨性和表面能的影响

在经过离子渗氮(PN)处理的冷作模具钢Cr12MoV基体上,采用闭合场非平衡磁控溅射离子镀法制备CrNiTiN镀层,与未渗氮的试样进行了膜/基结合力、耐磨性和表面能的对比。研究表明,CrNiTiN膜层具有较低的表面能,但是膜层和基体的结合力较差。Cr12MoV钢经离子氮化后,CrNiTiN膜层与氮化层间结合紧密,提高了膜与基体的承载能力;离子氮化处理使膜层的摩擦系数和磨损率明显降低;离子氮化会提高CrNiTiN膜层总表面能,但不会影响表面的抗粘性能。     

Temperature measurements and adhesion properties of plasma sprayed thermal barrier coatings

Metal-ceramic coatings have been widely used for industrial applications, mainly in the gas turbine and diesel engine industries as thermal barrier coatings (TBCs). Conventional thermal barrier coatings consist of a metallic bond coat and an insulating ceramic topcoat. Temperatures and temperature gradients in the coating during plasma spraying play an important role on the final coating quality, especially the temperature of the particles just hitting the substrate surface. In this work, metal-ceramic coatings were applied on nickel-superalloy substrates. The temperatures of both the coating surface and substrate were measured during spraying. The adhesion of the coatings was determined using ASTM C 633 and correlated with the measured temperatures. Optical pyrometry and thermocouples were used to measure the interfacial and substrate temperatures, respectively. Temperature was shown to have a significant influence where lower interfacial temperatures were found to result in lower adhesion values.     

High orientation Al films growth on LiNbO3 single crystal and its adhesion

High orientation Al films were deposited on 64°Y-XLiNbO3 substrate by DC magnetron sputtering and the influence of deposition temperature on microstructure and adhesion properties of Al films were investigated. The results show that crystallographic orientation of films varies with substrate temperature and the adhesion strength between LiNbO3 and Al films strongly depends on crystallographic orientation of Al films. The (111) orientated Al films shows stronger adhesion strength to LiNbO3 substrate than (100) orientated films. There is an optimum substrate temperature of 60 ℃ and hardening temperature of 200 ℃ for obtaining high (111) orientated Al films with good surface structure and adhesion property. Using this Al film, we have successfully fabricated the SAW filters with high frequency of about 1.89 GHz.     

Physico-mechanical properties of coatings produced by electric arc metallising with flux-cored wires*

The results of investigations of the physico-mechanical properties of coatings produced by spraying with flux-cored wires with different components in the charge are presented. It is noted that electric arc spraying is a highly productive method which can be used to deposit wear-, creep- and corrosion-resisting coatings. A shortcoming of these coatings is low adhesion strength. The results of theoretical investigations are analysed using the results of previous investigations carried out to increase the adhesion strength of coatings. The results of investigations of the microhardness, macrostructure, bonding strength and extent of wear of the coatings produced by spraying with flux-cored wires are presented. The experimental results are used to determine the composition of the flux-cored wires which produce coatings with higher mechanical and physical properties.