Comparison between polyaniline-phosphate and polypyrrole-phosphate composite coatings for mild steel corrosion protection

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

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: German
• Weight: 186 KB
• Volume: 57
• Category: Article
• ISSN: 0947-5117
• DOI: 10.1002/maco.200503940

✦ Synopsis

Abstract

Polyaniline, polypyrrole and their composites have been deposited on mild steel electrode from aqueous oxalic acid solution by using cyclic voltammetry (CV) technique. The resulting coatings were characterized by scanning electron microscopy and EDX analysis. The protective performance against corrosion of these coatings is evaluated by using electrochemical impedance spectroscopy (EIS) technique in corrosive solution (3.5% NaCl). Impedance data indicates a noticeable enhancement of protection against corrosion processes. Also, comparison of polyaniline‐phosphate and polypyrrole‐phosphate coatings indicates better corrosion protection with polyaniline‐phosphate coatings.