Corrosion inhibition of stainless steel by polyaniline, poly(2-chloroaniline), and poly(aniline-co-2-chloroaniline) in HCl

Hür E., Bereket G., Şahin Y.

Progress in Organic Coatings, vol.57, no.2, pp.149-158, 2006 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 2
  • Publication Date: 2006
  • Doi Number: 10.1016/j.porgcoat.2006.08.004
  • Title of Journal : Progress in Organic Coatings
  • Page Numbers: pp.149-158


Polyaniline (PANi), poly(2-chloroaniline) (PClANi), and poly(aniline-co-2-chloroaniline) (co-PClANi) films were synthesized by electrochemical deposition on 304-stainless steel (SS) from an acetonitrile solution. The structural properties of these polymer films were characterized by spectroscopic (FTIR and UV-vis) and electrochemical (cyclic voltammetry) methods. Open circuit potential-time (Eocp-time) curves, potentiodynamic polarization, and electrochemical impedance (EIS) measurements showed that these films have significant protective performance against corrosion of SS in 0.5 M HCl solution. It was found that co-PClANi film has acted as a passivator as well as barrier for cathodic reduction reaction in a similar manner as PANi film. However, PClANi film has behaved only as barrier for corrosion protection of SS in 0.5 M HCl. © 2006 Elsevier B.V. All rights reserved.