Sand blasting is generally used for cleaning and derusting of H-beam steel components with high frequency welding. Manual active tools are generally used for rust removal, such as shovel knife, steel wire brush, power steel wire brush, power sandpaper plate or grinding wheel.
Before rust removal, thick rust layer should be removed, visible grease and dirt should also be cleaned; After rust removal, floating ash and debris should be removed from the surface of HF welded H beam members. When the grinding wheel is used to remove rust, the grinding wheel should not appear on the surface. Before flame derusting, thick rust layer should be removed. Flame derusting shall include the use of a power wire brush after the flame heating operation to remove the residual material attached to the steel surface after heating.