Effect of surface layer softening from previous electrochemical corrosion on electrochemical cold drawing of Q235 steel bar

The effects of H2SO4 concentration and current in electrochemical corrosion on surface layer softening or plasticizing of Q235 steel bar and their effects on subsequent electrochemical cold drawing (ECD) were investigated. The results indicate that the electrochemical corrosion can soften or plasticize the surface layer of Q235 steel bar and then make the subsequent ECD be conducted more easily. The softening degree and thickness of the surface...