Effect of cutting parameters on pitting corrosion resistance of S32760 duplex stainless steel

To improve the performance in service of S32760 duplex stainless steel (DSS) in the marine environment, the influence of cutting parameters of S32760 DSS on the pitting corrosion resistance of the workpiece is studied. Cutting experiments are performed on S32760 DSS by varying the cutting parameters to investigate their effects on the surface morphology. The electrochemical experiments are conducted on the workpiece immersed in the 3.5 wt% sodium chloride solution to investigate how the cutting parameters affect the pitting corrosion resistance of S32760 DSS. The results indicate that the pitting corrosion resistance is influenced by the cutting speed and feed rate, which in turn affects the surface roughness. The cutting depth does not have a significant impact on the surface roughness but significantly affects the pitting resistance. The recommended cutting parameters are as follows: feed rate of 0.1 mm/r, cutting speed of 130 m/min, and cutting depth of 0.4 mm. In this manuscript, the electrochemical corrosion test was carried out on the machined surface of S32760 duplex stainless steel (DSS) to study the influence of cutting parameters and surface morphology on surface corrosion resistance. The above influence law is analyzed to provide a better combination of cutting parameters for cutting S32760 DSS.