Corrosion protection of stainless steel plates in fuel cells environment by conducting polymers

• Published in: Materials and corrosion Vol. 65; no. 1; pp. 67 - 75
• Main Authors: Bazzaoui, M., Martins, J. I., Bazzaoui, E. A., Albourine, A., Martins, L.
• Format: Journal Article
• Language: English
• Published: Weinheim Blackwell Publishing Ltd 01-01-2014; Wiley-VCH; Wiley Subscription Services, Inc
• Subjects: Anions; Applied sciences; Corrosion; Corrosion environments; Corrosion prevention; Exact sciences and technology; Metals. Metallurgy; polyaniline; Polymers; polypyrrole; Spectrum analysis; Stainless steel; stainless steel, sulphuric acid; Sulfuric acid; sulphuric acid; Polymer; Corrosion; Corrosion protection; Stainless steel; Sheet metal
• ISSN: 0947-5117; 1521-4176
• DOI: 10.1002/maco.201206502

The electrodeposition of polypyrrole and polyaniline has been performed in aqueous solutions of sodium saccharinate and sulphuric acid, respectively. The coatings were obtained by voltamperometric and galvanostatic methods. The corrosion behaviour of polypyrrole and polyaniline coated stainless steel (SS) in sulphuric acid medium was investigated by linear polarisation, open circuit potential and electrochemical impedance spectroscopy. The polyaniline coatings doped with sulphate anions (SO42−) showed more resistance to protect SS to corrosion than the polypyrrole coatings doped with saccharinate anions (C7H4NO3S−).