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为了探究附着力促进剂对铝阴极板表面环氧涂层性能的影响,本文通过拉拔实验、盐雾实验、硫酸锌浸泡实验以及交流阻抗测试,系统研究了磷酸酯类和硅烷偶联剂类附着力促进剂对环氧涂层附着力和耐腐蚀性的影响。结果表明:附着力促进剂可以明显提升环氧涂层和铝基材的结合力,添加 3%附着力促进剂 2063的涂层附着力最优,可以达到 12. 85 MPa,破坏类型以层间破坏为主;但是交流阻抗图谱显示其低频区的阻抗值比附着力促进剂 4512的低 2个数量级,通过盐雾实验和硫酸锌浸泡实验也可以看出附着力促进剂 4512可以显著提升环氧涂层的耐腐蚀性能。为平衡涂层附着力和耐腐蚀性能,通过将附着力促进剂 2063与 4512按质量比 2∶1进行复配,其附着力和耐腐蚀性可以满足要求,附着力可以达到 14. 4 MPa。 相似文献
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为了延长涂层的使用寿命,改善涂层被划伤后因水分子渗入、涂层附着力降低而导致的腐蚀蔓延情况,选用环氧树脂、固化剂、活性粉料、附着力促进剂及其他助剂制备了一种高固体分、低腐蚀蔓延的环氧底漆。分别讨论了固化剂、活性粉料及附着力促进剂对漆膜耐蚀性的影响,结果发现采用改性曼尼希碱固化剂,以6%磷酸锌、6%氧化锌、3%三聚磷酸铝和1%钼酸锌复配作为活性粉料,并且在加入0.5%附着力促进剂的情况下所制备的底漆的固含量达到80%以上,斯托默黏度仅95 KU,有利于施工。经中性盐雾试验120 h后,其漆膜的划线单侧腐蚀≤1 mm,1 032 h后的腐蚀宽度约为1.26 mm,腐蚀蔓延水平较低。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献