Impact of grain refinement on electrochemical behavior of ferritic stainless steel in alkaline solution

Hadi Irani¹ Mehdi Shaban Ghazani²

1) Department of Materials Science Engineering, Sahand University of Technology, P.O.Box: 51335-1996, Tabriz, Iran. Email:
2) Department of Materials Science Engineering, University of Bonab, P.O.Box: 5551761167, Bonab, Iran. Email:

IOI Code : XCAZ-EHHZH
Publication : 2nd. International Congress on science & Engineering - paris(parisconf.com)
Abstract :
    The present study investigated the influence of grain refinement on the electrochemical response of Fe-18.5% Cr ferritic stainless steel in 0.01 M NaOH solution. To investigate the electrochemical behavior of material, the open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry analysis was carried out. OCP analysis demonstrated that the passive film formed on coarse-grained sample is more stable than fine-grained one. ESI measurements also indicated that grain refinement reduces the thickness of the passive film and degrades the corrosion resistance. Also, the potentiodynamic polarization measurements showed that grain refinement reduces the corrosion resistance of Fe-18.5 Cr ferritic stainless steel in the NaOH solution.

Keywords : ferritic stainless steel grain refinement electrochemical properties eis measurement potentiodynamic polarization