DJH仪法测定彩涂板涂层厚度的影响因素分析

从DJH仪的钻头、记号笔标记和显微镜观测系统这3个方面着手,探讨彩涂板涂层厚度检测结果的影响因素。试验结果表明:随着钻头钻孔次数的增加,涂层厚度测定值增大,当钻孔次数超过1 500次后,涂层厚度测定值增加比较明显;记号笔标记对彩涂板涂层厚度测定值的影响一般5%。此外,涂层厚度测定值还与显微镜测量标尺、人工操作水平、涂料特性和显示器分辨率等有关,提出了减少上述这些影响的相关措施。     

彩涂板涂层厚度检测结果影响因素的分析

彩涂板涂层厚度是彩涂板成品检测中的重要指标,它直接影响彩涂板其它各项性能,其准确与否不仅影响彩涂板的质量,而且也影响生产成本。     

热浸镀锌和热浸镀铝锌彩涂板的切边抗盐雾性能的比较与研究

对热浸镀锌和热浸镀铝锌彩涂板的切边进行盐雾腐蚀试验的对比研究,并得出结论认为,同等厚度金属涂层对彩涂板切边的抗盐雾性能影响区别不大,直接影响其表现的还是表面涂料涂层的种类和涂装质量。     

宝钢彩涂钢板涂层管理及常见使用问题

介绍了目前宝钢彩涂钢板的品种(包括基板类型和涂层类型)、颜色及涂层管理中采取的一些有效措施。简要分析了彩涂板使用中出现的一些涂层常见问题。     

家电彩板耐腐蚀与涂层机械性能影响因素分析

耐腐蚀性能与涂层机械性能是家电彩涂板重要性能指标,直接关系到家电产品的使用寿命。通过采用正交试验,分别选择前处理钝化工艺、涂层烘烤温度以及涂层厚度等3个影响因素,分析了各个因素对家电彩板涂层机械性能和耐腐蚀性能的影响及其显著性,提出了合理选择前处理钝化工艺是提高家电彩板的耐腐蚀性能及涂层机械性能的主要措施。     

彩涂板常见质量缺陷原因及对策分析

彩涂板产品的理化性能、涂层表面质量两者相结合共同决定了彩涂板产品的综合质量。本文从影响彩色涂层钢板质量的基板、生产工艺控制等方面着手,对彩涂板生成中产生的质量缺陷的原因进行了分析探讨,提出了相应的控制措施及对策。     

彩涂钢板试验技术及其应用

简要叙述了我国彩涂板产业的发展与彩涂板生产的质量状况，重点介绍了国内彩色涂层钢板试验技术的开发与应用现状。     

预底合一家电彩涂板的特性研究

通过研发一种兼顾钝化与底漆双重功能的复合药剂,并结合产线实际,研究了预底合一家电彩涂板耐中性盐雾性能、耐高温高湿性能、弯曲性能以及电化学行为。结果表明：预底合一单涂层板作为某些特殊用途时,可以满足耐蚀性要求;预底合一家电彩涂板的耐中性盐雾,弯曲时涂层抗脱落或抗开裂以及耐高温高湿等各项性能均满足现有产品的技术指标,电化学极化曲线以及交流阻抗均表明,涂覆一层涂层,能够大大提高彩涂板的耐蚀性。该技术不仅提升了家电彩涂板在高端家电中的份额,还因缩短工序减少能耗,具有良好的应用前景。     

绒面彩涂极脱漆缺陷分析

通过扫描电镜以及辉光光谱,分析导致绒面彩涂板在后序加工过程中脱漆的因素。试验结果表明,缺陷彩涂板在彩涂机组预处理段因预处理剂涂覆量不足,以及热镀锌表面轻微氧化生成ZnO,导致涂层与基材附着力下降,造成绒面彩涂板在后序加工过程中表面脱漆。     

家电彩涂板表面失光缺陷的原因及对其耐蚀性能的影响

针对某些家电彩涂板经过一定时间的放置或在加工使用过程中发生的局部表面光泽明显降低(即失光)现象,利用扫描电镜和电化学方法对高光泽家电彩涂板涂层表面与脱漆后基板表面的表面形貌及化学成分的分析,确定了家电彩涂板表面失光缺陷是由涂前的基板表面形成镀层氧化物造成的,通过盐雾试验对比,确定了该缺陷对彩涂板的耐腐蚀性能具有严重影响,并提出了改进措施,减少家电彩板表面失光缺陷的发生除了要加强涂前工序控制外,还要避免将彩涂板存放在高温高湿的环境中。     

Fretting wear of thin diamond films deposited on steel substrates

The dominant wear mechanism of thin diamond films deposited onto steel substrates and the effect of film thickness on their lifetime under fretting conditions were studied by analyzing the running-in and the main period of the coatings wear life. Steel plate and steel ball specimens for the present study were both coated with diamond by chemical vapor deposition (CVD). The wear tracks resulting from the fretting tests were investigated by various surface analysis methods. The results showed that the dominant wear mechanism of the diamond coatings, when both surfaces are coated, is an abrasive form of fretting wear. Under these conditions, the lifetime of the diamond films increased with increasing film thickness. It was found that the wear rate during the main period is independent on the initial thickness of the diamond film and therefore its life depends on the residual thickness at the end of the running-in period.     

Influence of the adhesive thickness and steel plate thickness on the behaviour of strengthened concrete beams

The technique of strengthening concrete structures by epoxy bonding the steel plates to the tension face of the structure has been widely used in civil engineering. In this paper, the surface preparation of the concrete and steel plates is described and then the bonding technique is discussed. The influence of the adhesive thickness and the steel plate thickness on the behaviour of strengthened concrete beam is investigated. Beams with six different thicknesses of adhesive layer and five different thicknesses of steel plate were used in this study. The measured load versus strain curves for both the steel plate and the concrete of the strengthened beam were plotted. The results indicate that the ultimate flexural strength does not increase with increasing thickness of the adhesive. The strain at the first cracks in the concrete is unchanged with increasing adhesive thickness. However, at higher loads, the strain in the plate, as well as in the concrete, increased with increasing adhesive thickness. The strain in the steel plate increased at the same rate as that in the concrete in the elastic region and then the strain in the steel plate increased at a much faster rate for the same beam. The results also indicate that the strain corresponding to the ultimate load in the steel plate decreased with increasing plate thickness. The stiffness of the beam increased with the plate thickness, especially in the higher load range.     

Physical properties and photocatalytic performance of TiO2 coated stainless steel plate

This research was conducted for the development of TiO₂ thin film coated stainless steel useful in environmental and sanitary fields such as removal of indoor air pollutants and prevention of harmful microorganisms in the kitchen and bathroom. For this purpose, the research was focused on the examination of physical properties of coated surfaces as well as the photocatalytic performance of the steel plates. The coated steel’s cohesiveness and anti-corrosion effect were good enough to be used even in the hard environments. To test the photocatalytic performance of the TiO₂ thin film coated stainless steel plate, photodegradations ofm-xylene, a typical air pollutant produced by automobiles, andE. coli, under 365 nm UV irradiation, were conducted. The TiO₂ coated stainless steel plate considerably enhanced the degradation efficiencies ofm-xylene andE. coli.     

Einfluss der Plattendicke auf die Kontaktzeit beim elastischen Stoßvorgang

Using a free fall apparatus, the coefficient of restitution and the contact time of steel spheres at impact on thin gold‐coated glass plates were measured experimentally. The influence of the impact velocity, the particle size, and the plate thickness has been investigated. The measurements were evaluated using the Zener model. However, since the model merely considers energy dissipation due to elastic flexural waves and ignores additional energy dissipation by friction and viscous damping, the experimental values remain slightly below the theoretical Zener curve.     

栓接玻璃钢储罐新型工艺

本文详细阐述了储罐的一种新型工艺即栓接玻璃钢储罐的材料工艺和安装工艺.储罐主体壁板采用表面被涂衬3左右有机玻璃纤维的钢板,接缝连接方式是螺栓连接,密封方式采用瑞士Sika聚氨酯密封胶封闭.安装工艺包括了储罐底部与基础连接,水平接缝和纵向接缝的密封胶填充,壁板连接,顶板组装和安装,罐壁现场开孔和管口安装.     

彩色涂层钢板涂料热风加热固化的节能

对彩色涂层钢板生产中涂料加热方法进行了比较,回顾了实现节能的历程。介绍了一种在低氧含量的惰性气氛下利用废气循环热风加热固化的新技术及使用效果。     

Characterizing the surface structure of plastics coatings

Excellent appearance of the coated exterior car parts is one of the aims at the applications of plastics for automotive painting. The painted plastics parts and the metal car body should have comparable surface structures not depending on the different substrate materials (steel or plastics) used. Against this background parameters influencing the surface of plastics parts are becoming recently more important. To characterize the overall appearance of a coating system mainly two different techniques are used in the automotive and paint industry. The mechanical profilometry yields a detailed information of the topography so that substrate influences and other effects on the final coating appearance can be described. In addition to mechanical methods several optical methods are existing to describe the surface structure. Especially the “wave-scan” (Byk-Gardner) should be named, which was developed to transfer the visual impression into detectable measuring data. The measuring principle is based on the modulation of the light of a small laser diode reflected by the surface structures of the sample. These methods (mechanical profilometry and wave-scan), in the past mainly used for coated steel substrates, are demonstrated showing typical examples with focus on plastics applications.     

Effects of coating thickness and surface treatment on the corrosion protection of diglycidyl ether bisphenol-A based epoxy coated carbon steel

The corrosion resistance of carbon steel specimens was compared, using different surface treatment methods such as blasting and zinc phosphate treatment on carbon steel followed by application of different coating thickness. Specimen surface morphology was observed by SEM. The corrosion performance of epoxy coated carbon steel was examined by electrochemical impedance spectroscopy (EIS), along with immersion test in 0.5N-NaCl solution and NORSOK M 501 cyclic test, respectively. EIS results showed that higher thickness of epoxy coating and zinc phosphate treatment on carbon steel showed better corrosion protection than rest of the specimens. Specimens with no treatment and blasting treatment followed by epoxy coating, showed poor corrosion protection. Results of NORSOK M 501 cyclic test showed similar trend as those of EIS results however degradation of specimens was more severe than those from immersion test.     

复合管板结构在换热器设计中的应用

在硫铵用换热器设计中 ,采用碳钢管板衬一层不锈钢薄板结构。管板设计时 ,碳钢管板的厚度应满足设计厚度 ,管板与换热管的焊缝满足拉脱应力强度 ,碳钢管复层满足防腐要求。给出了管板的设计结构图。因换热管伸出碳钢管板长度大于GB 15 1- 89中的规定长度 ,换热管与管板焊缝的有效截面积大于标准中的规定 ,从而保证了管板与换热管的拉脱应力强度。