Easily-pickled low-carbon steel wire rod and control method of surface scale of easily-pickled low-carbon steel wire rod

The invention discloses an easily-pickled low-carbon steel wire rod and a control method for a surface scale of the easily-pickled low-carbon steel wire rod and relates to the technical field of steel rolling. The control method for the surface scale of the easily-pickled low-carbon steel wire rod includes the following steps of: step S1, rolling; step S2, discharging a wire at a temperature of 820 DEG C to 850 DEG C; and step S3, conducting a cooling step, specifically, slowly cooling the low-carbon steel wire rod obtained in the discharging step to a temperature of 580 DE C to 670 DEG C, then conducting quenching treatment to a temperature of 390 DEG C to 410 DEG C, and then conducting air cooling to the room temperature. Through reasonable matching of all the above steps, it is guaranteed that the finally-obtained iron oxide scale is relatively thin and is composed of three different phases (Fe3O4, FeO and Fe2O3) with specific thicknesses; all the phases are distributed in a layered mode, so that the iron