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钢结构防腐蚀涂装是利用涂层的保护作用,防止钢结构腐蚀,延长其使用寿命.钢结构防火涂装是使钢结构在遭遇火灾时,能在构件所要求的耐火极限内不致倒塌,因此受到业内人士的广泛重视.针对防火涂料对钢结构阻燃的有效性,分析了钢结构防锈、防火涂料的种类与作用,研究了钢结构防腐、防火涂料的设计与施工,提出了涂装质量保证措施. 相似文献
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用有机硅、丙烯酸树脂、环氧树脂和功能颜填料配制了一种烧蚀性隔热防腐蚀涂料,进行高温隔热性能及防腐蚀性能检测,探讨了烧蚀性隔热涂料在未经受高温冲击时涂层的防腐蚀性能(耐湿热和耐盐雾性能等)和在不同的高温下,烧蚀性隔热涂料的保温隔热性能,以及防腐蚀性能与耐高温隔热性能间的协调关系。 相似文献
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氟涂料在桥梁钢结构腐蚀防护中的应用 总被引:3,自引:1,他引:2
桥梁钢塔、钢箱梁、钢桁梁、钢拱、桥梁缆索(斜拉索、主缆索股、吊索等)系统是现代大跨度桥梁悬索桥、斜拉桥和拱吊桥的主要承重结构,这些钢结构长期暴露在风雨、潮湿和被污染的环境中,既有“应力腐蚀”、“疲劳腐蚀”,又有“金属腐蚀”,桥梁钢结构件都容易遭受腐蚀破坏,为了保证桥梁的安全,必须对桥梁钢结构进行防腐保护。介绍了氟树脂材料在桥梁钢结构实用防腐蚀保护系统中的应用,分析和探讨氟涂料长效钢结构防腐蚀保护技术及应用中的有关问题。 相似文献
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桥梁钢塔、钢箱梁、钢桁粱、钢拱、桥梁缆索(斜拉索、主缆索股、吊索等)系统是现代大跨度桥梁悬索桥、斜拉桥和拱吊桥的主要承重结构,这些钢结构长期暴露在风雨、潮湿和被污染的环境中,既有“应力腐蚀”、“疲劳腐蚀”,又有“金属腐蚀”,桥梁钢结构件都容易遭受腐蚀破坏,为了保证桥梁的安全,必须对桥梁钢结构进行防腐保护。介绍了氟树脂材料在桥梁钢结构实用防腐蚀保护系统中的应用,分析和探讨氟涂料长效钢结构防腐蚀保护技术及应用中的有关问题。 相似文献
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从海洋涂料、大型钢结构涂料、航空涂料、地下管道涂料和重防腐涂料近年来的一些变化来论述防腐蚀涂料的发展. 相似文献
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Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn3−x Cox(PO4 )2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn3 (PO4 )2. Solid solutions of orthophosphates of composition Zn3−x Cux (PO4 )2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu3 (PO4 )2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn3 (PO4 )2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn3 (PO4 )2. Attempts to synthesize Cu+ ZnPO4 and Cu+ Cu2+ Zn3 (PO4 )3 were unsuccessful. 相似文献
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为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。 相似文献
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建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。 相似文献
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相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。 相似文献
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膜的污染和劣化及其防治对策 总被引:25,自引:0,他引:25
较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。 相似文献
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James L. White David G. Salladay David O. Quisenberry Donald L. MacLean 《应用聚合物科学杂志》1972,16(11):2811-2827
Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described. 相似文献