Seamless steel pipe surface defects roll mark removal method

First, mechanical grinding method

Mechanical grinding method is one of the more commonly used methods for removing surface defects of steel pipe, it can be through the grinding wheel, emery cloth, sandpaper and other abrasives to grind off the surface defects. However, this method is relatively time-consuming, requires multiple grinding to completely remove defects, and the grinding process is prone to form new surface defects. Therefore, the number of mechanical grinding should be minimized, while paying attention to the size of the grinding force to avoid excessive damage to the steel pipe.

Second, pickling method

Pickling method is a fast method of removing surface defects of steel pipe, you can use the acid solution to corrode the defective surface iron and other substances, but you need to pay attention to the type and concentration of the pickling agent, as well as the time and temperature control of pickling. In addition, because the acid cleaning agent is harmful to the environment and health, the operation needs to wear protective equipment.

Third, electrochemical polishing method
Electrochemical polishing method is a non-destructive method of removing surface defects in steel pipe, which utilizes electrolysis to dissolve away the metal at the defects to achieve the effect of smooth surface. This method is simple and efficient, but pay attention to the use of suitable electrolyte and control the current density to avoid the generation of new surface defects.
In summary, there are many ways to remove surface defects of steel pipe, to choose the appropriate method depends on the specific circumstances. No matter which method is taken, the operator should ensure that the operation is standardized, and master the skills of the method, as well as pay attention to safety and environmental protection issues. At the same time, in the steel pipe production process, should also strengthen the control of steel pipe surface defects, as far as possible to reduce the appearance of defects.