高压无气喷涂在工程机械制造业中的应用探讨

介绍了高压无气喷涂的原理,从涂装效率、涂料利用率、喷枪等方面探讨了高压无气喷涂与空气喷涂的区别和优势,并简述了高压无气喷涂在工程机械行业应用的注意事项。     

双组分高压无气喷涂泵的发展

简介了单组分高压无气喷涂泵的优点及不足,以及新一代双组分高压无气喷涂泵的特点及适用场合.     

高压无气喷涂工艺技术的应用

高压无气喷涂工艺是国内近几年才发展起来的新工艺，其在大面积涂装喷涂中有着独特的优点。本介绍了高压无气喷涂的原理及其设备部件的工作原理同时阐述了如何进行操作与维护以及故障排除、施工注意事项等。     

高压无气喷涂工艺设备技术的应用

本文介绍了高压无气喷涂的原理,高压泵等部件的原理结构和工艺要求。同时提出了如何进行操作与维护和故障排除以及喷涂施工时应注意的事项。     

《水溶性电泳漆》

一种新型的油漆施工方法 对于油漆的施工方法,过去主要是用毛刷刷涂。近数十年来才逐渐发展一些新的施工方法如:空气喷涂、高压无气喷涂、静电喷涂、浸涂、流涂、滚涂等工艺。自从六十代年初期电泳涂漆新工艺问世以来,使油漆施工工艺又进入了一个新的一飞跃。这种新型的油漆施工方法具有如下的特点: 一、电泳涂漆用的水溶性漆,系以水作溶剂,在储藏、运输和施工时都能保证安全,无火灾危险。     

一山聚氨酯研发成功屋面保温防水体系

一山聚氨酯最新推出屋面保温防水一体化体系，是采用喷涂聚氨酯硬质泡沫作为保温材料，然后再喷涂1层无溶剂、双组分的聚氨酯喷涂弹性体材料。采用美国进口专用高压无气喷涂设符喷涂成型，10s以内即可固化，十几分钟后即可上人行走，每人每天每台设备可施工约1000m^2左右。     

中国防水涂料机械化施工势在必行

分析了中国防水行业材料应用市场的发展现状;通过对JS防水涂料采用高压无气喷涂方式在上海3 000 m2实际项目的应用试验,分析了我国防水涂料采用机械化施工在工艺设备上具备的条件,以及给企业带来的利益;指出防水行业应更新理念、创造条件,推动防水涂料机械化施工在我国的发展进程。     

涂料施工过程中火灾、爆炸、中毒事故原因分析及预防措施

涂料施工方式主要有刷涂、喷涂、电泳涂漆、浸涂、淋涂、滚涂等。其中喷涂又包括空气喷涂、无空气喷涂、静电喷涂、粉末静电喷涂等。无论采用何种施工方式,由于涂料属于易燃易爆的危险化学品,施工过程易发生事故,而火灾、爆炸、中毒事故则是涂料施工过程中危害最大的几种事故。     

涂装节能喷涂设备的运用

如何正确选择喷涂设备,使我们的涂装更加节能、高效和完美,首先就要了解喷涂设备的分类及各自特点。本文详细介绍了空气喷涂设备、高压无气喷涂设备、空气辅助无气喷涂设备、高效低压喷涂设备和静电喷涂设备等五类流体喷涂设备的功用特点与结构原理。     

乳胶漆无气喷涂施工中微泡的控制

本文分析了乳胶漆无气喷涂施工中微泡形成的主要影响因素，通过改变乳胶漆的配方达到控制减少喷涂过程中微泡的产生。     

Electrical explosion spray of Ag/C composite coating and its deposition behavior

Ag–C composite coating exhibits excellent electrical and thermal conductivities, good arc mobility, and low contact resistance, making it has a good prospect in switch contact of high voltage isolators. At present, the electro-deposition method is mainly used to prepare Ag/C composite coatings. However, the production efficiency of the electro-deposition method is low and the obtained coatings are thin. The electrical explosion spraying, due to its simplicity and high efficiency, has attracted significant attention in coating preparation. In this study, a new method that confines Ag and graphite powders in a tube for electrical explosion spraying was proposed. Powder electrical explosion spraying was used for preparing an Ag/C composite coating by employing a self-designed device. The heating behavior of the powder during exploding, macroscopic morphology, micromorphology, deposition efficiency, and thickness of the coatings, as well as the deposition behavior of the sprayed particles, were investigated. After a single spraying, a dense and uniform Ag/C composite coating was obtained at the charging voltage of 13 kV and a spray distance of 18 mm. The results show that the coating area is approximately 39.25 mm², the coating thickness was 50 μm, and the deposition efficiency was 35%. the coatings have good adhesion with the substrate. the interface between the coating and the substrate appeared as an inter-diffusion of elements, which was typical of a metallurgical bonding interface. Graphite is evenly distributed in the coating. Furthermore, the underlying deposition behavior of the coating was carefully characterized.     

金属底材涂料的水性涂装研究

粉末涂料以其特有的环保性和优异的涂装效果运用于多个领域,但常用的静电喷涂工艺会产生大量的粉尘,维护成本较高。本文主要研究一种粉末涂料的水性涂装工艺,重点考察了环氧聚酯型粉末涂料在水性涂装过程中不同消泡剂和不同烘烤条件等因素的影响。结果表明：当水粉比为（ 0.65~0.75）∶1,硅油消泡剂添加量为 1.5%的涂料试板于 60 ℃干燥 3 min后以 10 ℃/min升温速率升至 180 ℃,固化 15 min,得到的涂层性能符合 HG/T 2006—2006要求,与静电喷涂效果基本一致。粉末涂料的水性涂装法工艺流程短、设备简单、操作便利、无粉尘污染,是一种环境友好、切实有效的涂装方法。     

HVOF喷涂用于提高锅炉换热面耐磨损耐腐蚀性能综述

火力发电是我国的主要发电方式,在燃用煤、生物质等固体燃料时会面临锅炉换热面的冲蚀磨损或腐蚀问题,导致管道失效停炉,严重影响了电厂的安全稳定运行。超声速火焰（HVOF）喷涂作为热喷涂工艺的一种,可以通过在换热管道表面添加防护涂层来缓解磨损或腐蚀问题。因其制备的涂层具有与基体结合强度高、孔隙率低等优异的特点,在锅炉换热面的耐磨损耐腐蚀方面研究及应用前景广阔。综述了HVOF喷涂的发展、工艺流程以及涂层的特性,并重点总结了用于提升锅炉换热面耐磨损耐腐蚀性能的HVOF涂层材料,以及不同材料应用时需要考虑的环境因素。最后从工艺优化、材料进步以及实验方法创新三个方面对HVOF工艺在锅炉换热面上的应用做出展望。     

Structure and properties of flame‐sprayed poly(ethylene‐co‐vinyl alcohol) copolymer coatings

Powder coatings formed by flame spraying are being used in industrial applications. The resistance of plastics and their composite materials to chemicals, solvents, and atmospheric conditions and their high impact strength even at low service temperatures increase the importance of plastic and plastic‐based coatings. In this study, an ethylene vinyl alcohol copolymer powder was coated via flame spraying with gases of oxygen and acetylene. The bond strengths and microstructures of the coatings were determined with tensile testing, scanning electron microscopy, and Fourier transform infrared. The bond strengths of the coatings were determined according to ASTM C 633. Oxidizing, carburizing, and neutral flames were used. The bond strengths were lower for the oxidizing and carburizing coatings than for the neutral flame coatings. The results indicated that during the flame‐spraying process, the composition, gas, spraying distance, and coating thickness were important factors in the coating bond strength. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1357–1364, 2004     

Structure and properties of AlSi/polyester coating

Powder coatings, which are formed by plasma spray technique, are being used in industrial applications. Resistance of plastics and their based composite materials to chemicals, solvents, atmospheric conditions, and high impact strength even at low service temperature increases the importance of plastic and plastic based coating applications. In this study, aluminum silicon based polyester (AlSi/polyester) coating was applied by plasma spraying technique with and without intermediate bond layer coat (NiAl). The effect of coating thickness, intermediate bond layer coat, and plasma spraying parameters on bond strength of coating were studied experimentally. The bond strengths of the coatings were determined according to the ASTM C‐633–79. Microstructures of the coating were examined by optic microscopy and scanning electron microscopy (SEM), respectively. Obtained results indicated that plasma spraying current rate, coating thickness, and spraying distance were important factors on bond strength of coating. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2437–2444, 2004     

Microstructure and wear properties of plasma‐sprayed aluminum–silicon–polyester coatings

Powder coatings, which are made by plasma‐spraying processes, are being used in industrial applications because of their wear resistance, chemical resistance, and high impact strength even at low service temperatures. These factors increase the importance of plastic and plastic‐based coatings in industrial applications. In this study, an aluminum–silicon–polyester‐based composite coating was applied by plasma‐spraying processes with and without an intermediate bond coat (Ni–Al). The effects of the coating thickness, intermediate bond coat, and processes parameters on the microstructure and wear properties of the coating were studied experimentally. The wear properties of the coatings were determined according to ball‐on‐disk procedure. The microstructures of the coating were examined by optical microscopy and scanning electron microscopy. The results indicated that the plasma‐spraying current and thickness had a strong influence on the wear resistance and microstructural properties of the aluminum–silicon–polyester coating. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3609–3614, 2006     

陶瓷涂层结构优化及失效机理的研究现状

陶瓷涂层以其优异的耐磨损、耐高温、耐腐蚀等性能表现出巨大的工程应用前景。但是,在服役过程中因温度变化和受力诱发的裂纹产生、扩展,甚至导致涂层开裂、剥落及失效,这些因素限制了涂层的应用,因此通过结构优化改善陶瓷涂层的抗开裂、剥落性能较为重要。本文首先论述了纳米结构涂层、耐磨多层涂层、复合涂层的失效机理及其结构优化。提出了利用单次喷涂制备粘结层和陶瓷层的方法,通过该方法可以消除陶瓷层与粘结层间的界面形态,提高涂层的断裂韧性、粘结强度。最后展望了陶瓷涂层在材料组分设计和工艺优化研究中应重点关注的方面。     

A comparative study of MoSi2 coatings manufactured by atmospheric and vacuum plasma spray processes

In this work, MoSi₂ coatings were manufactured by atmospheric plasma spraying (APS) and vacuum plasma spraying (VPS) technologies, respectively. Phase composition and microstructure of the coatings were characterized by X-ray diffraction and scanning electron microscopy. Microhardness, void and oxygen content of the coatings were also determined. Oxidation behavior of the coatings at high temperature was examined. The results showed that the surface of VPS-MoSi₂ coating was dense and homogeneous. However, there were many microcracks formed on the surface of APS-MoSi₂ coating. The VPS-MoSi₂ coating also had lower void and oxygen contents, higher Vickers hardness compared with those of APS-MoSi₂ coating. Besides, oxidation resistance of the VPS-MoSi₂ coating was better than that of APS-MoSi₂ at 1500 °C.     

Effect of environmental pressure on the microstructure of YSZ thermal barrier coating via suspension plasma spraying

Suspension plasma spraying (SPS) as a potential technique to prepare thermal barrier coatings (TBCs) has been attracting more and more attention. However, most reports on SPS were carried out in the atmosphere. Given the unique features of in-flight particles and plasma jets under low pressure, the resulting coatings are expected to be different from those under atmospheric pressure. In this article, yttria-stabilized zirconia (YSZ) thermal barrier coatings were prepared using suspension plasma spraying under different environmental pressures. The results show that as the environmental pressure decreased, the column-like structural coating turned into a vertical crack segmented structure, as well as a dramatic decrease in surface roughness. More nanoparticle agglomerates were formed in the coating under lower environmental pressures. The real porosity of the coating increased with a decrease in environmental pressure.     

电弧喷涂与粉末涂料喷涂复合涂层防护技术

研究了热固性粉末涂料用作金属热喷涂涂层的封闭层及面层的防护技术,比较了分别喷涂环氧锌基重防腐粉末涂料、纯聚酯粉末涂料,喷涂环氧锌基重防腐粉末涂料后再喷涂纯聚酯粉末涂料以及热浸镀锌后喷涂纯聚酯粉末涂料等试样在不同盐雾和人工加速老化时间下的附着力.结果发现,只有熔融黏度偏低的环氧类粉末涂料适合用作封闭层.该复合涂层技术已应用于高速公路护栏上.