Polyaniline, poly(N-methylaniline) and poly(aniline-co-N-methylaniline) coatings on stainless steel
Yükleniyor...
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Polyaniline (PANI), poly(N-methylaniline) (PNMA) and poly(aniline-co-N-methylaniline) (PANI-co-PNMA) coatings were synthesised on stainless steel (SS) surface (AISI 316) in two different supporting solutions, oxalic acid and sulphamic acid. PNMA and PANI-co-PNMA films failed to be synthesised in sulphamic acid solution. Homo-and copolymer films were achieved as homogenous and adherent structures as shown in scanning electron images. Electrochemical corrosion properties of homo-and copolymer films were investigated in 3.5% NaCl solution by electrochemical techniques including a potentiodynamic method and ac impedance spectroscopy. Potentiodynamic studies proved that the PNMA coating had a better electroactive structure in comparison with homo-and copolymer coatings. The results showed that homo- and copolymer coatings exhibited an effective barrier property on a SS electrode and a remarkable anodic protection to the substrate for a longer exposure time. A superior corrosion protection property was obtained by PNMA coating by providing enhanced catalytic efficiency for the formation of protective oxide layers on the metal surface.
Açıklama
Anahtar Kelimeler
Corrosion resistance, Conducting polymers, Coatings, EIS, SEM
Kaynak
Transactions of The Institute of Metal Finishing
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
89
Sayı
4
