锈蚀是钢梁的主要缺点,铁路纵梁上翼缘(即上盖板),通过桥枕承受列车动荷脉冲压摩,枕底密贴梁面,该部位隐蔽,通风不良,其间的积水,尤其是机车车辆洒下的含酸碱等污物长期浸泡,锈蚀较一般杆件严重。加上防锈施工困难,要使养护周期与一般部件相适应,必须选用防潮、防腐、耐磨、抗压的材料进行表面处理。 Corrosion is the main drawback of steel girders. The upper flange (ie, the upper cover plate) of the railway longitudinal girder bears the impulse load and pressure of the train through the bridge pillow, and the bottom of the pillow is closely attached to the girder surface. This part is concealed, with poor ventilation, and the water accumulated during the course, especially It is the long-term soaking of dirt, alkalis, and other contaminants that are spilled on locomotives and vehicles. Corrosion is more serious than ordinary rods. In addition to the difficulty in rust-proof construction, it is necessary to use moisture-proof, anti-corrosion, wear-resistant, and pressure-resistant materials for surface treatment in order to adapt the maintenance cycle to general components.