Influence of tungstate ion dopants in corrosion protection behavior of polyaniline coating on mild steel

✍ Scribed by M. Sabouri; T. Shahrabi; M. G. Hosseini

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: German
• Weight: 150 KB
• Volume: 59
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200804170

✦ Synopsis

Abstract

Electropolymerization of polyaniline (PANI) and polyaniline‐tungstate (PANIW) coatings on mild steel were successfully performed using cyclic voltammetry technique. Processes were carried out in aqueous electrolyte solutions of 0.3 M oxalic acid + 0.1 M aniline and 0.3 M oxalic acid + 0.1 M aniline + 0.001 M sodium tungstate dehydrate. Corrosion protection of PANI and PANIW coatings was evaluated with the help of open circuit potential (E~ocp~) monitoring and electrochemical impedance spectroscopy (EIS) methods. All the results reveal the influence of additional doping agent (i.e., tungstate) in corrosion protection behavior of PANI coating.