Zinc coating thickness is directly related to the corrosion life, it must be guaranteed. GB / T 13912 in the provisions of the minimum thickness of the zinc coating of steel parts are shown in Table 2, and in the provisions of GB 2694: The plating thickness is less than 5 mm, zinc coating weight should not be less than 460 g / m2,80 channel Prices that the zinc layer thickness should not be less than 65 μm; when the plating thickness is greater than or equal to 5 mm, zinc coating weight should not be less than 610 g / m2, Hefei channel, namely zinc layer thickness should not be less than 86 μm. Other countries, the standard provisions galvanized steel parts zinc layer thickness in Table 3-6 (Table 2-6 in the relevant standards set forth in the centrifugal casting and processing parts are not included). Equilateral channel steel cold-formed surface quality requirements are as follows: 1, the surface may not have bubbles, cracks, scars, folds, inclusions and face stratification, q235 channel, allowing no more than 10% of the nominal thickness of slightly concave pits, bumps, indentations, hairline, abrasions and pressed into the oxide skin; 2, surface defects allows grinding method to clean up, but cleaning up the depth of no more than 10% of the nominal thickness; 3, cold-formed welded hollow steel welding must not have open solder joints, lap welding, burn and severe dislocation; 4, outer burr welds should be cleared within the burr weld can not be cleared. How much money one meter channel | Show Bo Trading (certified) | Hefei channels provided by the Hefei exhibition Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) is Hefei, steel leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In the exhibition of Commerce Bo leadership with the staff warmly welcome all inquiries negotiations to create the exhibition of Commerce Bo better future.