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花岗岩建材化学清洗除锈研究 总被引:1,自引:0,他引:1
对花岗岩锈迹斑的成因进行了理论分析,并对花岗岩锈迹进行了化学清洗和电化学处理。试验表明,运用化学清洗可以消除花岗岩锈斑,减少花岗岩开料的废品率,改善花岗岩制品质量,提高产品会晤,化学清洗除锈可在花岗网岩制品工业生产中得到实际应用。 相似文献
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某电厂在高参数长周期运行后超滤系统膜组件存在严重的生物污损和铁污染,确定采用碱洗法和酸洗法两种方案清洗滤膜。经两种方案超滤膜化学清洗方案比较发现,酸洗法效果显著,碱洗法效果不明显。经酸洗后,单套超滤膜系统压差降至15~20kPa,产水流量达到100~122t/h。 相似文献
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针对某种 EDTA化学清洗工艺 ,筛选出一种综合性能优良的缓蚀剂 ,对缓蚀剂性能评价方法进行了探讨 相似文献
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化学清洗与物理清洗技术在工业清洗中的联合应用 总被引:1,自引:0,他引:1
通过对某换热器及某小区供暖系统管路的清洗实例,介绍了化学清洗与物理清洗应用技术。实践证明,两种技术相结合与使用单一的清洗技术相比,效率更高,效果更好。 相似文献
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Carlota M. Grossi Franeisco Javier Alonso Rosa M. Esbert Araceli Rojo 《Color research and application》2007,32(2):152-159
This article presents the effect of laser radiation on the color of ornamental granites used for external cladding. The laboratory experimentation was undertaken on a widely used coarse‐grain granite commercially known as Rosa Porriño. The irradiation was carried out with a Q‐switched Nd:YAG laser at 1064 nm and several energy densities (fluences) on polished surfaces, dry and wet, uncoated, and artificially coated‐simulating a black crust. Laser effects on the granite surface were determined by color measurements with a colorimeter. These measurements made possible to determine probable damage due to laser radiation and the diverse response of different minerals. The analysis of the data also suggests potential causes for the color change and applicability limits of the technique. The a*‐parameter, or red–green component, is the most affected, leading to a change in hab (hue) and was interpreted as a result in variations in the Fe compounds, which strongly condition stone color. No significant changes in L* (luminosity or lightness) or Cab* (chroma) may indicate no relevant alterations in the surface polish. When using laser irradiation to remove black layers on granite surfaces, variations of L* can be indicative of the cleaning effectiveness. This research results may be useful to select laser parameters when managing ornamental granite cleaning operations. However, they also suggest the need of further experimentation in specific techniques of analysis as well as different laser wavelengths. © 2007 Wiley Periodicals, Inc. Col Res Appl, 32, 152 – 159, 2007 相似文献
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