The serrated steel bar grating has large drainage and high drainage quality: the leakage area is 83.3%, which is more than twice that of cast iron. The standardized pressure welded steel bar grating has the advantages of beautiful appearance and convenient installation. The size and scale of objects passed or lost on special occasions can also meet strict requirements. Serrated steel grating refers to a pressure-welded steel grating with a bearing capacity of less than 25 mm. In addition to the standard pressure-welded steel mesh, it also has an aesthetically pleasing appearance. The specifications and models of the steel grating are the same as those of the general flat steel. The difference is that the teeth on the side of the flat steel are uneven, which is mainly manifested in the anti-skid property. Serrated bar grating has outstanding anti-skid effect. The serrated metal grating is not only lubricated and beautiful, but also hot-dip galvanized on the outside. The silvery white enhances the contemporary style and can be used in a variety of indoor and outdoor settings. Effect of the chemical composition of the base material of the hot-dip galvanized steel grating on the adhesion of the zinc layer: The hot-dip galvanized steel grating generally uses low-carbon flat steel as the base material, and its steel base W is relatively high. Practice has proved that the high W of the steel base will cause the Fe-Zn alloy layer to thicken violently to form an off-white coating, which will deteriorate the adhesion of the galvanized layer. In addition, the mechanism of the influence of C is that the steel base participates in severe reactions, resulting in the thickening of the Fe-zn alloy layer and the deterioration of the adhesion of the zinc layer. According to the meshing principle, increasing the surface roughness of the circular plate can improve the adhesion of the zinc layer, but in fact, due to the roughness of the steel grating substrate surface, it also creates favorable conditions for the residue of rolling oil, grease and iron powder. It is not conducive to improving the adhesion of the zinc layer, and even tends to deteriorate. The galvanizing time of the hot-dip galvanized steel grating should be understood as that after the substrate of the steel grating enters the zinc liquid and leaves the liquid surface, the coating is cooled until the Fe and zn atoms cannot diffuse for a long distance. When galvanizing, when the intermediate layer is formed, in order to prevent the further diffusion reaction of Fe-Zn in the coating and ensure the zinc difference and uniformity of the Fe2Al5 intermediate layer, the coating should be cooled as soon as possible so that the Fe and Zn atoms lose their diffusion ability as soon as possible.
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