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介绍了在用溴化锂制冷机内腔污垢清洗的有关技术问题,特别是对内腔腐蚀严重的机组化学清洗中的药剂选择、配方和工艺作了详细阐述。 相似文献
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压铸铝合金散热器内腔化学镀镍技术 总被引:2,自引:0,他引:2
针对家用压铸铝合金散热器的特点,选用化学镀镍技术对其内腔进行处理。、介绍了该处理技术的工艺流程及工艺规范。讨论了前处理工艺、施镀方式和后处理工艺对镀层性能的影响。测定了镀层的结合力及耐蚀性结果表明,利用自制的特殊夹具并采用槽外保温施镀的方法,对压铸铝合金散热器内腔采用2次浸镍舍佥及预镀碱性化学镀镍工艺之后再进行酸性化学镀镍,可提高其耐蚀性及导热性,并可实现批量生产及自动化生产。 相似文献
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针对车身腐蚀防护的问题,从车身防腐区域等级划分、内腔电泳膜厚标准要求以及车身内腔电泳孔开孔设计要求等方面进行了分析,阐述了车身内腔电泳防腐设计可以在车型设计之初有效地保证车身整体防腐性能,提高产品质量,并且降低后期模具设变成本,减少问题改善周期,节约工艺验证费用。 相似文献
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综述了目前中国涂料业的发展概况,并介绍了今后发展趋势和研究热点──防腐蚀涂料、卷材涂料、功能涂料、绿色木器涂料和粉末涂料等5种涂料。 相似文献
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国内外涂料工业现状及发展趋势(一)--世界涂料工业现状及发展趋势 总被引:5,自引:0,他引:5
概述了国外涂料工业现状。对世界范围内的水性涂料、粉末涂料、无溶剂型涂料和高固体份涂料等低污染、无公害涂料和环境贡献型涂料、功能型涂料(包括氟碳树脂涂料、喷涂聚脲弹性体、有机-无机复合涂料、高装饰涂料、隐身涂料和智能型涂料)等方面的应用与研究概况以及纳米材料在涂料中的应用进行了总结,指出了今后的发展趋势。 相似文献
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饰面膨胀型防火涂料的研制 总被引:8,自引:0,他引:8
报道了一种水性双组分膨胀型饰面防火涂料的研制。涂料的组分Ⅰ由基料 (A)、填料和添加剂组成 ;组分Ⅱ为磷酸。基料是特制的双氰胺 -尿素 -甲醛共聚物的胶体溶液。填料是二氧化钛 (B) ,添加剂是三氧化二锑 (C)、季戊四醇 (D)、氯化石腊 (E)。当组分Ⅰ组成为m (A)∶m(B)∶m (C)∶m (D)∶m (E) =1 0 0∶0 30∶0 0 4∶0 0 6∶0 0 4,m (组分Ⅰ )∶m (组分Ⅱ ) =1 0 0∶0 2 5时 ,性能达到饰面防火涂料一级标准。用正交优化工艺制备的防火涂料 ,涂覆比 1 0kg/m2 时 ,耐火时间超过 2h ,可作超薄型钢结构防火涂料使用。该防火涂料的特点是 :不但防火性能好、不污染环境、适用范围广 ,而且装饰效果好 ,达到普通涂料的装饰水平 相似文献
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The aim of this work was to evaluate the influence of the operating conditions on the coating efficiency for urea coated in a spouted bed and to analyse the decrease of nitrogen volatilisation for the coated urea. Coating efficiencies in the range (from 44.24% to 73.7%) were obtained for the different process conditions applied. Volatilisation analyses showed that the polymer film coating provided a decrease of the nitrogen loss in the range from 3% to 57%. The use of vinasse in substitution to the water in the coating suspension was tested for the optimum process conditions. © 2012 Canadian Society for Chemical Engineering 相似文献
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UV-curable waterborne unsaturated polyesters for wood coatings were prepared. The effects of different polyols and acids on the properties of the UV-curable waterborne unsaturated polyesters were investigated. Several different unsaturated polyester prepolymers were prepared from three different polyols [ethylene glycol (EG), diethylene glycol (DEG), and propylene glycol (PG)] and three different acids [tetrahydrophthalic anhydride (THPAn), terephthalic acid (TPA), and trimellic anhydride (TMAn)]. UV-curable coating materials were formulated from the prepolymers and 2-hydroxy-2-methylphenyolpropane-1-one as a photoinitiator with distilled water as a diluent. Trimethylolpropane diallyl ether was used as an air inhibitor of cure. The dynamic mechanical studies showed the properties of those unsaturated polyesters were well correlated with their glass transition temperature behaviors. It was found that the unsaturated polyester prepared with 60/40 (mol %) TMAn/THPAn and the equimolar mixture of EG, DEG, and PG showed balanced coating properties such as good tensile properties and weatherability, as well as proper viscosity (ca. 2500 cps) when using distilled water as a diluent. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 695–708, 1998 相似文献
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汽车水性金属闪光漆的研究及发展 总被引:1,自引:0,他引:1
为了控制VOC的排放,减轻环境的污染,水性涂料日益成为人们关注的焦点。由于外观和环保等因素,汽车用水性金属闪光涂料也逐渐占据汽车涂料市场。分析了汽车水性金属闪光漆的闪光原理。详细阐述了汽车水性金属闪光漆的主要组分及其作用,并介绍了其涂装工艺。同时,对水性金属闪光漆的研究方向及发展前景进行了展望。 相似文献
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分析了中国涂料工业的发展现状以及面临的挑战。对我国各种功能型涂料———防火涂料、地坪涂料、氟碳涂料、纳米复合涂料、伪装涂料、船舶防污涂料、重防腐涂料、卷材涂料、水性聚氨酯涂料和隔热涂料等的研究现状进行了概述。提出了中国涂料工业的发展思路。 相似文献