Paper Title:
Studies on the Effects of the Potential Sweep Rates and pH on the Corrosion Rate of Polyaniline Coated Steel
  Abstract

Polyaniline (PAni) film was successfully electrodeposited on the surface of steel substrates in oxalic acid electrolyte by cyclic voltammetry at different potential sweep rates (dE/dt) (10, 20 and 30 mVs-1) and different pH values (1.55, 2.55 and 3.55). The coated steel with PAni was characterized by Field Emission Scanning Electron Microscopy (FESEM) and Fourier Transform Infrared Spectroscopy (FTIR) techniques. The corrosion resistance of the electrodeposited layers was evaluated by potentiodynamic polarization in 0.1 M NaCl aqueous solution. The results showed that with increasing pH and sweep rate the amount of corrosion rate decreased and increased respectively. Moreover, the correlation between variation of anodic charge (Qa) with pH and sweep rate has been evaluated. The variation of anodic charge confirmed that the growing rate of polymer decreased with increasing sweep rate and pH. The result of potentiodynamic polarization showed that the coated steel with synthesized PAni in pH 3.5 and sweep rate 0.01Vs-1 had better protective properties against corrosion.

  Info
Periodical
Advanced Materials Research (Volumes 264-265)
Edited by
M.S.J. Hashmi, S. Mridha and S. Naher
Pages
463-468
DOI
10.4028/www.scientific.net/AMR.264-265.463
Citation
M.R. Mahmoudian, Y. Alias, W. J. Basirun, "Studies on the Effects of the Potential Sweep Rates and pH on the Corrosion Rate of Polyaniline Coated Steel", Advanced Materials Research, Vols. 264-265, pp. 463-468, 2011
Online since
June 2011
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$32.00
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