共查询到19条相似文献,搜索用时 187 毫秒
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锅炉化学清洗是保持受热面清洁的有效措施之一,对于以氧化铁为主要成分的垢样采用缓蚀盐酸清洗剂进行清洗,并采用氨洗除铜,通过保持好缓蚀剂的添加量,在保证除垢的同时缓蚀效果良好。 相似文献
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研制了一种由阴离子表面活性剂、非离子表面活性剂和多种助剂配制而成的不锈钢抛光用低温高效超声波除蜡清洗剂。采用正交试验优化了该清洗剂的配方。讨论了除蜡剂浓度、超声清洗温度对该清洗剂除蜡效果的影响。该清洗剂浊点在85℃以上,因此适合在较低温度下工作,且除蜡能力强、成本低、使用高效节能。 相似文献
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研制出一种除焦油和积碳的复合清洗剂,它由水基碱性清洗剂和溶剂基清洗剂复配而成.通过工程实例论述该清洗剂在施工中的应用和清洗效果. 相似文献
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汽车冷却系统超声波-化学联合法清洗研究 总被引:1,自引:0,他引:1
对比研究了化学法、超声波法以及超声波-化学联合法对汽车冷却系统中通水管和散热器水垢的清洗效果,以清洗前后的质量变化率和腐蚀速率为衡量指标。结果表明,三种清洗方式的清洗的质量变化率依次为超声波-化学联合法>超声波法>化学法;化学法中选择以氨基磺酸为主的配方化学清洗,最高的清洗变化率可达3.87%,通水管和散热器铜片的腐蚀速率分别为1.27和1.20 mg/(cm2.h);超声波清洗的质量变化率最高可达3.92%,通水管和散热器铜片的腐蚀速率分别为0.002和0.001 mg/(cm2.h)。在超声波-化学联合法清洗效果中,选择氨基磺酸为主的配方+超声波清洗,质量变化率最高可达到6.13%,通水管和散热器铜片的腐蚀速率分别为3.29和3.28 mg/(cm2.h)。 相似文献
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The current review describes electrochemical evaluation and study of copper chemical-mechanical polishing (CMP) slurries and post-CMP cleaning solutions. Electrochemical and surface analyses of commercial and new developed CMP slurries over the last decade are discussed. It is stated that the main CMP requirement needed from slurries, to provide copper passivity, is not being complied in all commercial slurries, since copper is being actively dissolved in all of them. Two novel systems based on alkaline weak acid salts (K-sorbate and K-carbonate) are being reviewed, as well. Once considering post-CMP slurries it is shown that HNO3 based solutions are highly effective in copper layers etching. Simultaneous etching of silicon oxide and copper layers can be efficiently conducted in diluted HF solutions. The composition of etching solution usually includes inhibitors, and surface active compounds. However, copper etching in aqueous solutions is usually accompanied with a deposition of corrosion products (Cu(1) compounds). Formation of such deposition is being determined electrochemically subsequent to an etching process (at OCP) in some of the recommended post-CMP cleaning solutions. Cautious consideration should be taken once choosing the most appropriate etching solution for Cu post-CMP cleaning. 相似文献
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炭窑口硫铁矿选矿试验厂是为处理单一硫铁矿而建的选矿厂。为充分回收铜硫矿石中的有益组分,开展了细磨浮选流程与粗磨齐尾后铜粗精矿再磨精选流程的研究,试验证明后者可显著提高铜精矿品位和收率。为此,对试验厂进行了技术改造,增设了铜硫分离和铜粗精矿再磨车间。生产指标达到了技改设计的要求,经济效益每年可增加150万元。二个月就可回收技改项目的全部投资。 相似文献
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比较几种酸对纯铜焊接件中氧化皮、表面杂质的去除能力,确定基础酸。选定几种表面活性剂与其配伍,通过比较除油效果,确定清洗液的最终成分和用量,同时确定焊接件清洗后的钝化处理方法,以达到保色防腐效果。结果表明,磷酸、氢氟酸、氟硼酸和柠檬酸可作基础酸,与聚醚NPE-108配伍可达到清洗效果,苯并三氮唑与硅酸钠有理想的保色性。 相似文献
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介绍了电厂凝汽器不停机清洗工艺的研究成果。通过模拟试验的方法研制出适用于电厂凝汽器不停机清洗的专用清洗剂,在此基础上,对清洗工艺参数作了全面的研究分析。研究结果和清洗实践表明,研制的不停机专用复合清洗剂具有高效无毒,对钢管、钢材、水塔、填料等腐蚀性小等特点。利用该清洗剂对电厂凝汽器不停机实施清洗效果好,经济效益显著,不会对汽水系统产生不良影响,对环境污染小。 相似文献
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F. L. Fragata C. C. Amorim A. P. Ordine M. C. Marroig R. O. Mota I. C. P. Margarit-Mattos 《Journal of Coatings Technology and Research》2009,6(2):229-235
Surface cleaning tools made of copper alloys are widely employed when sparks have to be avoided. On the other hand, copper
residues may be left on the surface. It is not known whether such copper incrustation interferes with the performance of a
painting system. Therefore, the aim of this paper is to evaluate the effect of steel surface treatment with copper-containing
tools on the performance of a painting system. Painted samples pretreated with ferrous and copper-containing tools were submitted
to corrosion tests. The performance was monitored by visual inspection and electrochemical impedance. The surfaces of unpainted
samples were analyzed by energy dispersion spectroscopy (EDS) and the open circuit potentials were measured. It is shown that
the residues left on the metallic surface due to the mechanical action of the cleaning tools did not interfere significantly
with the performance of the painting system. 相似文献