共查询到20条相似文献,搜索用时 89 毫秒
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介绍了国内外汽车工业和汽车涂料概况。综述了国外汽车底漆、中涂涂料、汽车面漆等涂料的现状,并提出了汽车涂料今后研究与开发的方向。 相似文献
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《材料保护》2002,35(11):57-57
汽车工业是世界上最大的工业 ,国外发达国家的汽车涂料一般占该国总量的 2 0 %。汽车涂料是涂料行业中质量要求最高的品种之一 ,汽车涂料反映了一个国家涂料工业和涂料技术的最高水平。汽车涂料分新车用涂料 (汽车制造业涂料 )和汽车修补用涂料 (修补漆 )两大类。目前国外的汽车涂装工艺 ,一般都实行底漆 (阴极电泳 )、中涂漆 (两喷一烘 )、面漆 (两喷一烘 )的三层涂装。近年来我国的汽车涂料得到了迅猛的发展。汽车涂料的年需求量 1996年 4~ 5万吨 ,2 0 0 0年我国汽车工业用漆约 7.4万吨 ,预计 2 0 0 2年全国汽车需用 12万吨涂料 ;目前全… 相似文献
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本文通过对6SE70逆变器控制端子的详细介绍,实现逆变器的模拟量输入、输出,开关量的输入、输出等显示和控制功能,以及对各端子在逆变器中参数设置做了详细介绍。 相似文献
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PLC在流量显示和累积计量上的应用 总被引:1,自引:0,他引:1
详细介绍了使用PLC(可编程逻辑控制器)进行流量累积、显示的编程算法,重点介绍了在编制程序时应该注意的问题,采用了哪些方法来解决这些问题,还给出了比较详细的编程例子,对于使用PLC进行流量累积具有很大的参考价值。 相似文献
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G. Pfaff 《Inorganic Materials》2003,39(2):123-126
A new class of special effect pigments based on synthetically manufactured silica flakes coated with metal oxides was developed and introduced into the market. Silica flake pigments show extraordinary color effects such as improved interference and strong angle-dependent behavior. They can be used in automotive paints, industrial paints, plastics, and printing inks. 相似文献
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Kumar M Islam MN Terry FL Freeman MJ Chan A Neelakandan M Manzur T 《Applied optics》2012,51(15):2794-2807
We measure the diffuse reflection spectrum of solid samples such as explosives (TNT, RDX, PETN), fertilizers (ammonium nitrate, urea), and paints (automotive and military grade) at a stand-off distance of 5 m using a mid-infrared supercontinuum light source with 3.9 W average output power. The output spectrum extends from 750-4300 nm, and it is generated by nonlinear spectral broadening in a 9 m long fluoride fiber pumped by high peak power pulses from a dual-stage erbium-ytterbium fiber amplifier operating at 1543 nm. The samples are distinguished using unique spectral signatures that are attributed to the molecular vibrations of the constituents. Signal-to-noise ratio (SNR) calculations demonstrate the feasibility of increasing the stand-off distance from 5 to ~150 m, with a corresponding drop in SNR from 28 to 10 dB. 相似文献
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We derive expressions for the intensity and polarization of light singly scattered by flake pigments or a rough surface beneath a smooth transparent coating using the ray or facet model. The distribution of local surface normals is used to calculate the bidirectional reflectance distribution function (BRDF). We discuss the different distribution functions that can be used to characterize the distribution of local surface normals. The light-scattering model is validated by measurements of the BRDF and polarization by a metallic flake pigmented coating. The results enable the extraction of a slope distribution function from the data, which is shown to be consistent over a variety of scattering geometries. These models are appropriate to estimate or predict the appearance of flake pigment automotive paints. 相似文献
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The aims of this study were to improve the emission test method for the 20 L small chamber standardized in Korea using paints and to develop an optical test method for paints. The emission factors of the total volatile organic compounds (TVOC) and formaldehyde from oil-based paints, emulsion paints and water-dispersion paints coated at 300 g/m(2) and cured for 24 (48)h were determined using the 20 L small chamber method. The emission factors of TVOC and formaldehyde from all paints under steady state conditions were determined after 7 days with 24 (48)h of curing. The Korean standards require that paints be measured and analyzed on the third day after a test. However, the emission factors of TVOC and formaldehyde from the paints only began to stabilize 7 days after installing the samples. Until now, the emission test results have been reported mainly as concentration vs. time or emission factor vs. time profiles of TVOC and formaldehyde. The emission factors of the target volatile organic compounds (VOCs) and aldehyde types were obtained under specific test conditions according to the different coating weights. For all target volatile organic compounds and aldehyde types examined, the paint coating weight had an effect on emission. 相似文献
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本文研究了纳米ZrO2、亚微米碳化硅、微米玻璃粉(软化点450℃)填料含量对304不锈钢表面纳米Al/Al2O3改性有机硅涂层的600℃高温氧化行为的影响。在1000 h氧化测试过程中,不锈钢样品表面涂层未出现剥落,未观察到基体氧化膜,说明涂层具有良好的抗氧化性能。对氧化后样品的显微观察表明,ZrO2、SiC和玻璃粉质量分数分别为7%、7%和3%时的涂层中未出现微孔,而玻璃粉质量分数为7%的两种涂层中则出现了大量的微孔。相应地,前者的氧化增重也仅为后两者的约60%,这说明减少玻璃粉的添加量,可消除涂层微孔,有利于提高涂层的抗氧化性能。 相似文献