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(Ni-P)-Al2O3纳米微粒化学复合镀--表面活性剂对镀层组织的影响 总被引:8,自引:0,他引:8
将纳米Al2O3应用于化学复合镀中,研究了表面活性剂对纳米Al2O3粉的分散状态和(Ni-P)-Al2O3纳米微粒复合镀层组织形貌的影响。结果表明,通过选择合适的表面活性剂对纳米Al2O3分散后再加入到镀液中进行施镀,方可得到分散均匀的复合镀层。 相似文献
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Ni-P/n-Al2 O3 化学复合镀镀液及工艺研究 总被引:5,自引:3,他引:2
以电位和镀速为评价指标,通过正交实验和单因素实验,确定了Ni-P/n-Al2O3化学复合镀的最佳工艺配方为:温度85~95℃,气体搅拌,pH值为4.5~5。所得镀液的最佳组成为:ρ(次亚磷酸钠)为21g/L,ρ(柠檬酸钠)为14g/L,ρ(苹果酸)12g/L,ρ(添加剂丁二酸)5g/L,ρ(氧化铝)8g/L,通过级差分析得到镀液配方中各因素对镀层耐蚀性能的影响次序为:柠檬酸〉次磷酸酸钠〉纳米氧化铝〉添加剂〉苹果酸。扫描电镜研宄表明,镀层均匀致密,为明显的胞状物;X-射线衍射实验证实,复合镀层的结构为非晶态。与Ni-P镀层相比,Ni-P/n-Al2O3化学复合镀镀层在质量分数分别为3.5%的氯化钠、10%的稀盐酸和10%的稀硫酸溶液中的耐蚀性能有了明显的提高。 相似文献
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综述了近年来国内外化学镀Ni-P基纳米复合镀层的研究进展,概述了纳米TiO2,SiO2,Al2O3、SiC、金刚石等对复合镀层耐磨性,耐蚀性的影响,介绍了纳米稀土氧化物在化学复合镀中的应用. 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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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献
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In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997 相似文献
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徐善明 《现代塑料加工应用》2008,20(5)
应用管理学和市场营销学的基本原理和方法,深入分析我国聚丙烯工业的内部和外部环境、市场状况以及加入WTO后所面临的机遇与挑战.在此基础上,应用SWTO(态势分析法),确认出主要的优势和劣势、机会和威胁,对我国聚丙烯工业的国际竞争力进行结构化的综合分析. 相似文献
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