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通过对福厦高铁安海湾跨海大桥的腐蚀环境和腐蚀因素分析,结合大桥涂装防腐寿命要求,设计了高性能石墨烯锌基氟碳涂层技术。采用鳞片型醇溶无机烯锌涂料作底涂层,环氧云铁(厚浆)涂料作为中间涂层,进口树脂氟碳面漆作为面涂层;通过耐盐雾、与水接触角、附着力、人工气候老化等测试方法对涂层性能进行了评价,对福厦高铁安海湾跨海大桥表面防腐涂层体系进行了研究;通过涂装前表面处理、防腐涂装体系要求和涂料产品技术要求等方面,严格控制大桥涂装质量,使配套体系满足福厦高铁安海湾跨海大桥使用寿命要求。 相似文献
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《中国涂料》2019,(12):12-19
研究设计了醇溶性有机/无机复合树脂,即通过自由基聚合制备醇溶性丙烯酸树脂,然后将其与硅溶胶进行物理冷拼,变换比例优化配方得到。利用FTIR和XRD对得到的树脂进行表征,同时通过TG和DSC等测试分析涂层的热力学性能。结果表明,硅溶胶掺入质量分数为40%时,能得到综合性能优良的有机/无机复合树脂。基于此复合树脂体系,加入片状锌粉得到应用于重防腐领域的醇溶性富锌防腐涂料。由于片状锌粉的阴极保护作用和锌粉片层形貌的物理阻隔作用,固化涂层具有优异的耐腐蚀性能。本研究制备的涂料,制备方法简便,得到的涂层性能优越。可应用于环境苛刻、要求较高的重防腐领域。此外,涂料所选用的乙醇溶剂,对环境危害较小,符合未来涂料发展方向。 相似文献
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针对钢制浮顶油罐外浮顶大面积暴露在大气中所产生的腐蚀现象,设计了一种新型碳纤维复合材料作为钢制外浮顶涂层材料,即利用滑石粉和KH550对常用树脂涂料(环氧乙烯基酯树脂、环氧树脂和间苯树脂)进行改性处理,并随后在其中掺入适量碳纤维粉合成出一系列新型碳纤维复合涂料。在与上述纯树脂涂料以及碳纤维粉复合未改性树脂涂料进行防腐性能比较时发现,改性处理后的环氧乙烯基酯树脂复合碳纤维粉涂料的防腐性能最佳,有望用于钢制外浮顶的防腐。 相似文献
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工业界加热炉系统的脱硫装置中烟气对金属的腐蚀很严重,特别是烟气GGH中的热管腐蚀制约着它的使用寿命。目前我国还没有成熟的方法解决这一问题,制约了GGH的推广使用。通过采用耐高温乙烯基树脂涂料、有机与无机结合的树脂陶瓷涂料、石墨烯改性钛纳米高分子高合金涂料(简称石墨烯涂料)3种体系的涂料在实验室、现场样管试验以及实际应用,通过3年多试验与应用证明,采用石墨烯改性涂层的热管比没有防腐涂层的热管(ND钢)可以提高使用寿命1倍以上。解决了热管的烟气露点的腐蚀问题。同时石墨烯涂料在脱硫系统中对金属腐蚀的防护,可以替代乙烯基玻璃鳞片树脂胶泥,提高金属防腐蚀寿命,降低设备投资。 相似文献
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The disbondment of protective organic coatings under excessive cathodic protection potentials is a widely reported coating failure mechanism. Traditional methods of evaluating cathodic disbondment are based on ex situ visual inspection of coated metal surfaces after being exposed to standard cathodic disbondment testing conditions for a long period of time. Although electrochemical impedance spectroscopy (EIS) has been employed as an effective means of evaluating various anti-corrosion properties of organic coatings; its application for assessing the cathodic disbondment resistance of coatings has not been sufficiently exploited. This paper reports an experimental study aimed at developing EIS into a tool for in situ measurement and monitoring of cathodic disbondment of coatings. A clear correlation between EIS parameters and the disbonded coating areas has been confirmed upon short term exposure of epoxy-coated steel electrodes to cathodic disbondment conditions; however the degree of this correlation was found to decrease with the extension of exposure duration. This observation suggests that EIS loses its sensitivity with the propagation of coating disbondment, and that in order to achieve quantitative determination of the coating cathodic disbondment localized EIS measurements are required to measure the parameters related to local disbonded areas. 相似文献
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在众多的涂层材料中,有机无机复合涂层材料在改善有机玻璃表面性能方面表现出独特的优点。本文中选择以透明甲基硅树脂为有机涂层,而后在有机涂层中添加纳米级陶瓷颗粒。固化成膜后,陶瓷纳米颗粒均匀分散在甲基硅树脂分子链中,无机相的存在将明显改善有机基体表面性能,将有机玻璃的耐磨性提高到了无机玻璃的水平。 相似文献
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Rossana Grilli Marie Laure Abel Mark A. Baker Barrie Dunn John F. Watts 《International Journal of Adhesion and Adhesives》2011,31(7):687-694
A thermodynamic study of the adsorption of an epoxy acrylate resin used for UV-cured coatings on two different anticorrosion pretreatments on aluminium alloys relevant to aerospace industry has been undertaken. Aluminium alloy Al2219 specimens, treated with an inorganic chromate based conversion coating (Alodine 1200S) and an organic titanium based conversion coating (Nabutan STI/310), were immersed in solutions of different concentrations of the resin and adsorption isotherms were determined by assessing the uptake of the adsorbate, as a function of solution concentration, by time-of-flight secondary ion mass spectrometry (ToF-SIMS). The results show different behaviour for the two substrates, which can be attributed to the organic component of the titanium based coating. In the case of the inorganic conversion coating a clear plateau is achieved at relatively low concentrations and at a lower level of adsorption than for the hybrid coating. The data for both the coatings conform well to the Langmuir model, the organic coating, as well as showing a higher level of adsorption of the resin, also presents oscillatory behaviour at low concentration, which is shown to be complementary to the behaviour of the reactive diluent included with the epoxy acrylate to aid processing. A discussion of this competitive adsorption of the epoxy resin and the diluent on the different substrates is presented, based on considerations of the chemistry of the systems under investigation. 相似文献
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磷酸镁涂层是一种新型、耐高温无机防火材料,同时,也是一种性能优异的工业钢结构无机防腐蚀材料。本文重点关注磷酸镁涂层在高温作用后的力学性能,通过试验系统研究了磷酸镁涂层在高温(100 ℃、200 ℃、300 ℃、400 ℃、500 ℃、700 ℃、900 ℃)作用后硬度、粘结强度等力学性能的变化,以及力学性能变化的微观机理。结果表明,高温后的磷酸镁涂层具有较好的完整性,表观无粉化、起泡、剥落和开裂等缺陷出现。相较于常温,高温后的磷酸镁涂层力学性能略有下降,其中300 ℃高温后的涂层粘结强度最低,且硬度下降最显著。此后随着温度升高,涂层力学性能有不同程度的提高。基于不同温度下微观表征和热重分析,揭示了造成磷酸镁涂层高温力学性能变化的四阶段高温演化机理。 相似文献
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航空涂层材料大气暴露试验评价 总被引:1,自引:0,他引:1
航空涂层材料在拉萨大气试验站进行了大气暴露试验,通过对七组试板的老化数据分析,对涂层体系和颜料体系进行评价,以无机颜料为主的涂层系统的耐候性明显好于以有机颜料为主的涂层系统。 相似文献