钢结构防腐与防火涂层表面缺陷的控制发布时间：2015-11-24 9:55:23 浏览次数:579
所以涂层完好无损时才能有效的保护作用。如果涂层出现缺陷，不好的保护作用。常见的表面缺陷及防止方法如表5个[ 9 ]。
Protective effect of coating: shielding effect. The purpose of the other two protection of the coating surface and the corrosive medium. Second, electrochemical protection. Metal zinc powder paint containing iron with higher activity. If the chemical medium of the bone, metal, zinc, the internal first contact occurs the electrochemical reaction of zinc as the sacrificial anode corrosion.
So the coating is in good condition to protect the effect. If the coating is defective, the protective effect is not good. Common surface defects and prevention methods are shown in Table 5 .
Construction quality and construction environment also has a great relationship. Now, the anti-corrosion engineering, temperature, humidity, considering the factors such as rainfall, wind and other factors. Temperature is too high, solvent evaporation fast coating. Simple labeling, wrinkling, pinhole, etc.. The temperature is too low, curing too slow or even stop, also may be the bead surface solidification. In the summer, the surface temperature of the sun is above 50.
So the summer open-air painting works. The humidity is too large, easy to rust, the surface layer, but it is easy to produce white, pinhole etc.. Generally speaking, the air humidity is big, 80% when the stop of painting works. In the wind to protect the surface pollution can reduce the influence of coating adhesion and appearance quality of coating. Wind, frost, rain, rain, fog days should stop coating engineering.