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彩涂板涂层附着力时效性能

返回列表 来源: 发布日期: 2019.12.18

彩涂板涂层附着力时效性能

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通过与盐雾试验结果的比较,发现在盐雾试验结果中,附着老化性能差的彩涂板发生3-4级起泡的概率远高于老化性能好的彩涂板,说明其附着老化性能良好涂层的老化性能与涂层的耐腐蚀性成正比,而颜色具有良好的附着力,涂层的老化性能与涂层的表面耐盐雾性能有关,耐CCT(循环腐蚀试验)等方面优于老化性能差的 彩涂板

也就是说,彩涂板的T形弯曲性能是镀层下金属腐蚀的初始性能。此时,仅从表面看,彩涂板不存在镀层起泡、脱落等现象,但T弯性能下降已表明镀层下的金属腐蚀开始发生。这是因为,即使涂层没有内部密度不均、微孔、裂纹和缝隙等缺陷,环境介质中仍有外部介质渗透的传输通道。涂层表面的水分子可以通过吸附、扩散、溶解等作用到达涂层金属基体的界面,直至涂层/金属基体结合界面被破坏。这种界面损伤的初始宏观表现可能是涂层附着力下降,表现为 彩涂板涂层附着力老化性能差,进一步的宏观表现是涂层起泡脱落。
因此,结合老化试验结果可以预测彩涂板的耐蚀性,对提高彩涂板产品质量具有良好的预警作用。
一、彩涂板的优点
1)具有自重轻、结构截面小的特点,既提高了使用面积率,又减少了地基的设置。强度高,安全性好。既可作为承重结构,也可作为围护结构。一般情况下,房屋内不设梁、柱。
2)实现工厂建设的产业化和生产化。彩钢板在工厂制造,在工厂安装。便于工厂计划生产和规范生产,降低建设成本。施工方便快捷,工期短。彩涂板施工为干结构,安装程度高,质量有保障。该装置不需要大型机械设备,施工速度快。
3)数据表面平整,便于清洗。在彩涂板的制造过程中,由于彩钢板精度高,未来施工表面平整度高,设备接口严密,不仅能满足洁净厂房内、外表面平整润滑、无裂纹、无颗粒脱落的要求,但也很容易清洗,因为它不怕水。出色的装饰。彩涂板在全部干法施工完成后,无需钻孔即可进行装饰,由于其平整度高、精度高,简化了界面装饰工艺。它不需要刷漆层、腻子打底,工艺简单,造成装修成本。
Compared with the results of salt spray test, it is found that the probability of grade 3-4 blistering of the color coated plate with poor adhesion aging performance is much higher than that of the color coated plate with good aging performance, which indicates that the aging performance of the coating with good adhesion aging performance is in direct proportion to the corrosion resistance of the coating, while the color has good adhesion, and the aging performance of the coating is in direct proportion to the salt spray resistance of the coating surface The CCT (cyclic corrosion test) is better than the color coated plate with poor aging performance.
 
That is to say, the T-bend performance of the color coated plate is the initial performance of metal corrosion under the coating. At this time, only from the surface, there is no blistering and falling off of the coating, but the decline of T-bend performance has indicated that the metal corrosion under the coating began to occur. This is because even if the coating has no defects such as uneven internal density, micropores, cracks and gaps, there are still transmission channels for external medium penetration in the environmental medium. The water molecules on the coating surface can reach the interface of the coating metal matrix through adsorption, diffusion and dissolution until the interface of the coating / metal matrix is destroyed. The initial macroscopic performance of this kind of interface damage may be the decrease of coating adhesion, which is manifested as the poor aging performance of coating adhesion, and the further macroscopic performance is the foaming and falling off of coating.
 
Therefore, combined with the aging test results, the corrosion resistance of the color coated plate can be predicted, which has a good early warning effect on improving the quality of the color coated plate.
 
Advantages of color coated plate
 
1) it has the characteristics of light self weight and small structure section, which not only improves the use area rate, but also reduces the setting of foundation. High strength, good safety. It can be used not only as a bearing structure, but also as an enclosure structure. Generally, there is no beam or column in the house.
 
2) realize industrialization and production of plant construction. Color steel plate is manufactured and installed in the factory. It is convenient for the factory to plan and standardize production and reduce construction cost. The construction is convenient and short. The construction of color steel plate is dry structure with high installation degree and guaranteed quality. The device does not need large-scale mechanical equipment, and the construction speed is fast.
 
3) the data surface is flat and easy to clean. In the manufacturing process of color steel plate, due to the high precision of color steel plate, high flatness of construction surface in the future and tight equipment interface, it can not only meet the requirements of smooth lubrication, no crack, no particle falling off on the inner and outer surfaces of clean workshop, but also easy to clean, because it is not afraid of water. Excellent decoration. The color steel plate can be decorated without drilling after all the dry construction is completed. Because of its high flatness and precision, the interface decoration technology is simplified. It doesn't need to brush paint layer and putty for bottoming, and the process is simple, resulting in decoration cost.
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