Corrosion protection performance of ceria-copolymer bilayer coating on 304 stainless steel in 0.1 M H2SO4 medium

Abstract

In this paper, we have reported the anti-corrosion performance of Ceria / poly (indole-co-pyrrole) (Ce/(poly(In-co-Py)) bilayer coating on 304 SS. Electrochemical polymerization of (poly (In-co-Py)) was achieved on ceria coated 304 SS (CeO2/304 SS) in acetonitrile medium containing LiClO4 (ACN-LiClO4) by scanning electron microscopy (SEM) with energy dispersive analysis of X-ray (EDAX) respectively. The corrosion defensive performance of this bilayer coating on 304 SS was investigated using electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in 0.1 M H2SO4. These results show that the bilayer coating on 304 SS lowered the permeability of corrosive ions present in the acidic medium and thus acts as a barrier against the attack of corrosive environment.