In order to increase the service life of square tube, we should choose a suitable steel substrate coating method, and hot-dip galvanizing is one of the good effects of Z. Hot dip galvanizing not only greatly improves the corrosion resistance of building steel, but also does not increase the sales volume of products such as hot-dip galvanized square pipes and hot-dip galvanized angle steels.
Hot dip galvanizing is the process of immersing rust proof steel structural components into a high-temperature molten zinc solution at or above 600 ℃, causing the surface of the steel structural components to adhere a zinc layer. Metal sheets with a zinc layer thickness less than 5mm shall not be less than 65 μ m. The thickness of thick steel plates should not be less than 86 μ M. To achieve the effect of corrosion prevention. In recent years, many compression plates have emerged in light steel structural systems. Hot dip galvanizing is also used to avoid corrosion. One process of hot-dip galvanizing is acid pickling for rust removal, followed by cleaning. Failure to follow these two process flows will leave safety hazards for corrosion prevention. Therefore, all issues need to be resolved. For steel structure architects, efforts should be made to avoid design schemes with prefabricated components on the mating surface, in order to prevent acid pickling and passivation in the gaps between the mating surfaces, or acid pickling and failure to remove them.