1. Scratch phenomenon on the surface of hot-dip galvanized angle steel: in order to avoid the accumulation of technical lubricant or products and or dirt, it is necessary to carry out mechanical finishing on the scratch and other rough surface of hot-dip galvanized angle steel.
2. The appearance of hot-dip galvanized angle steel presents the appearance of flux: the technology of using flux for welding includes craft welding, flux cored arc welding and submerged arc welding. These welding technologies will leave fine flux particles on the surface, which cannot be removed by general finishing methods. This particle will be the corrosion source of crevice corrosion. It is necessary to use mechanical finishing to remove the residual flux.
The above is the summary of some common problems and treatment methods in the production and use of hot-dip galvanizedangle steelfor you, I hope to help you!