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钢结构的防腐措施之热喷铝(锌)复合涂层

发布时间:2015-10-12 9:12:31 浏览次数:725
   这是一种与热浸锌防腐蚀效果相当的长效防腐蚀方法。具体做法是先对钢构件表面作喷砂除锈,使其表面露出金属光泽并打毛。再用乙炔-氧焰将不断送出的铝(锌)丝融化,并用压缩空气吹附到钢构件表面,以形成蜂窝状的铝(锌)喷涂层(厚度约80μm~100μm)。
    最后用环氧树脂或氯丁橡胶漆等涂料填充毛细孔,以形成复合涂层。此法无法在管状构件的内壁施工,因而管状构件两端必须做气密性封闭,以使内壁不会腐蚀。这种工艺的优点是对构件尺寸适应性强,构件形状尺寸几乎不受限制。大到如葛洲坝的船闸也是用这种方法施工的。另一个优点则是这种工艺的热影响是局部的,受约束的,因而不会产生热变形。

    与热浸锌相比,这种方法的工业化程度较低,喷砂喷铝(锌)的劳动强度大,质量也易受操作者的情绪变化影响。



This is a kind of with hot dip zinc anti-corrosion effect is long-term anti-corrosion methods. Particular way is first blast to the surface of steel members, make its surface with metallic luster and MAO. With acetylene and oxygen flame will continue to send the aluminum wire melting (zinc), and use compressed air to blow the attached to the surface of steel members, in order to form honeycomb aluminum (zinc) coating layer thickness (about 80 microns to 100 microns).

Finally or neoprene paint coating with epoxy resin filling wool stoma, to form a composite coating. This law cannot in the lining construction of tubular components, so must do air tightness closed on both ends of the tubular components, so that the internal corrosion. This process has the advantage of size of strong adaptability, component shape size is almost unlimited. To such as is in this way, the construction of gezhouba ship lock. Another advantage is the process of thermal effect is local, controlled, and won't produce thermal deformation.

Compared with hot dip zinc, this kind of method of industrialization degree is low, sandblasting spray aluminum (zinc) the intensity of labor is big, the quality is also affected by the operator's mood changes.




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