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2.4.4 涂料涂装质量的检查 涂装质量的检查包括非常广泛,一般主要分4个方面: 涂装前对钢材表面处理质量一定要按照涂装设计要求的除锈标准和等级进行严格检查,除锈不合格一定不进行涂装。另外除锈结束后6h之内一定要涂底漆,以免二次生锈影响涂装质量。 涂料产品自身质量检查,包括物理状态、涂料组成和贮存稳定等方面。 涂装过程中的质量检查,包括涂料的黏度、固体含量、遮盖力、用漆量、涂刷性能、流平性、干燥时间和打磨性及湿膜厚度检查等。 涂装后的质量检测,如:漆膜的厚度、硬度、弹性、冲击强度、附着力、耐候性、耐化… 相似文献
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研制了一种3层复合结构的油气储罐用降温节能涂料,介绍了复合涂层的制备方法,考察了树脂种类,颜填料粒径、含量、表面处理等对隔热防腐涂料性能的影响,以热反射率、热导率和热发射率表征了其隔热性能。结果表明,以环氧防腐底漆配合聚氨酯树脂隔热中涂层和热反射表面涂层,使用合适的功能性颜填料,可以使复合涂层获得理想的防腐和隔热效果。涂层的热反射率:白色为91.1%,灰色为78.5%。隔热中涂热导系数为0.08W/(m·K),热发射率为93.5%。涂装该隔热复合涂层的铁桶其内部温度降低8~10°C,外部表面温度降低12~20°C。 相似文献
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为了减少供热管道在能量传递过程中的损失,隔热材料需要进行优化提高其保温功能。本研究通过化学接枝法制备出具有高腐蚀抗性和耐高温性能的改性硅溶胶隔热涂料。电化学阻抗谱和扫描电镜分析表明:在隔热涂层表面涂刷封闭聚氨酯清漆后阻抗显著提高,具有良好的腐蚀防护性能。隔热试验表明:在 50 ℃盐水中有封闭清漆的涂层隔热性能优于无封闭的硅溶胶涂层。此外,封闭清漆能大幅提高硅溶胶涂层的耐磨性。试验结果表明,表面采用清漆封闭的硅溶胶涂层是一种优良的供热管道用耐蚀隔热材料。 相似文献
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研究了一种用于聚氨酯发泡塑料的涂装工艺.该工艺采用一些特殊的涂料组合和涂装加工方法,可以将涂层与发泡塑料的附着力提高到1级,并能极大地减少油斑、起泡、针孔等缺陷,从而保证了工业生产中表面涂层的质量。该工艺在普通涂装成本的前提下实现了聚氨酯发泡塑料的工业涂装。 相似文献
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介绍了一种加热炉表面保温修复技术中的应用,包括气凝胶隔热保温涂料应用、保温结构设计、保温涂装施工工艺及隔热效果评价。结果表明:采用自研气凝胶隔热保温涂料对加热炉表面保温失效区域进行修复,可以明显降低炉体表面温度,有效减少热量向外界的散热损耗,进而提高加热炉热效率;与原有保温涂层相比,修复用气凝胶保温涂层隔热性能及机械性能更加优异;在保温结构设计方案中,保温涂层与防护面层之间设计的界面剂粘接层可显著提高配套体系耐水、耐盐雾性能,降低保温层下腐蚀风险。 相似文献
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苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况,合成乙苯,苯乙烯所用的催化剂种类,并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。 相似文献
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《国际聚合物材料杂志》2012,61(1-4):113-122
Abstract Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed. 相似文献
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The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu3Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu3Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters. 相似文献
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对用甘油锌作光稳定剂的光稳定作用进行了测试,并与光稳定剂NBC,BZ进行了比较。研究了甘油锌,NBC和BZ与双酚A的复配效果。研究结果表明,甘油锌是一种性能优良的光稳定剂。 相似文献
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责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体. 相似文献
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Antioxidative activity and phenolic composition of pilot-plant and commercial extracts of sage and rosemary 总被引:5,自引:0,他引:5
Marie-Elisabeth Cuvelier Hubert Richard Claudette Berset 《Journal of the American Oil Chemists' Society》1996,73(5):645-652
Eight sage (Salvia officinalis) and twenty-four rosemary (Rosmarinus officinalis) extracts, originating from pilot-plant or commercial sources, had different antioxidative activities as measured by accelerated
autoxidation of methyl linoleate. Twenty-seven compounds were characterized in the Labiatae family extracts by high-performance
liquid chromatography (HPLC) coupled with mass spectrometry, equipped with an atmospheric pressure chemical ionization interface,
and by HPLC coupled with a photodiode array spectrophotometer. Twenty-two compounds were identified, including phenolic acids,
carnosol derivatives, and flavonoids. The extracts showed great variation in their HPLC profiles, and no correlation was apparent
between their antioxidative efficiency and their composition, in twenty specific phenols. Data indicated that the most effective
compounds were carnosol, rosmarinic acid, and carnosic acid, followed by caffeic acid, rosmanol, rosmadial, genkwanin, and
cirsimaritin. 相似文献