Effect of magnetoelectropolishing on corrosion behaviour of ferritic AISI 430 stainless steel

Abstract

The ferritic structure in the stainless steels introduces a number of complications of a metallurgical nature that can influence corrosion behaviour. Before the corrosion studies, three types of surface treatments have been performed on AISI 430 SS samples: mechanical/abrasive polishing MP, standard electrolytic polishing EP, and magnetoelectro-polishing MEP. Polarization curves were studied to compare the corrosion behaviour of 430 SS surface in aqueous 3% NaCl solution. In the corrosion studies also extensive pitting corrosion phenomenon was evaluated.