Corrosion resistant behaviour of PANI–metal bilayer coatings

Ananda Kumar, S and Shree Meenakshi, K and Sankara Narayanan, T S N and Srikanth, S (2008) Corrosion resistant behaviour of PANI–metal bilayer coatings. Progress in Organic Coatings, 62 (3). pp. 285-292.

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The present work discusses on the corrosion resistant behaviour of polymer metal bilayer coatings, viz. polyaniline (PANI), polyaniline–nickel (PANI–Ni), nickel–polyaniline (Ni–PANI), polyaniline–zinc (PANI–Zn) and zinc–polyaniline (Zn–PANI). The coatings were synthesized by means of cyclic voltametric method. The coatings thus obtained were uniform in nature and highly adherent to the mild steel substrate. The effectiveness of the coatings in preventing corrosion was tested by electrochemical impedance studies (EIS) using Nyquist and Bode plots and potentiodynamic polarization studies as well. Among the various coatings synthesized, the PANI–Zn coating was found to offer the maximum protection, followed by PANI–Ni coatings. Metal–PANI coatings were found to offer the least resistance to corrosion. The coatings thus obtained were characterized by scanning electron microscopic (SEM) analysis and the results are discussed.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Corrosion prevention; Bilayer coatings; Electrochemical impedance; PANI; Scanning electron microscope; Synergistic effect
Divisions:NML Chennai > Chemistry
ID Code:298
Deposited By:Dr. TSN Sankara Narayanan
Deposited On:24 Nov 2009 09:41
Last Modified:30 Nov 2011 09:40
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