Pitting Corrosion Resistance of AISI 316L Stainless Steel in Ringer's Solution after Magnetoelectrochemical Polishing

Abstract

Abstract The goal of this study was to investigate the pitting corrosion resistance of AISI 316L (UNS S31603) stainless steel in Ringer's solution after electrochemical polishing of the samples in a magnetic field induced by a permanent magnet under varying induction. For the studies, the complete statistical program of investigation was adopted on the basis of the five-level compositive rotary plan. The analysis of the results obtained in this work shows that the magnetic field considerably affects the corrosion resistance of austenitic stainless steel of Type AISI 316L electropolished under varied conditions. The magnetic field introduced during electropolishing has a big influence on the pitting corrosion resistance of stainless steels. A mathematical model has been found to be an exponential regression formula Upit = f (i, B), where Upit (mV) is the pitting potential, i(A/dm2) is the current density, and B (mT) is the magnetic induction.