Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Schiff Bases as Anticorrosive Additives for Mild Steel Corrosion in Acid Media

  • Abirami, M. (Dept. of Chemistry, P.S.G.R.Krishnammal College for Women) ;
  • Sasikala, S. (Dept. of Chemistry, P.S.G.R.Krishnammal College for Women) ;
  • Chitra, S. (Dept. of Chemistry, P.S.G.R.Krishnammal College for Women) ;
  • Parameswari, K. (Dept. of Chemistry, P.S.G.R.Krishnammal College for Women) ;
  • Selvaraj, A. (Dept of Chemistry, CBM College)
  • Published : 2009.02.01
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Abstract

The influence of Schiff bases on the corrosion inhibition of mild steel in 1 M $H_2SO_4$ have been investigated by weight loss, gasometry, impedance and polarization techniques. The results obtained reveal that these compounds act as good inhibitors. The inhibition efficiency of Schiff bases increased with concentration and synergistically increased on addition of chromate, sulphate and halide ions. Potentiodynamic polarization measurements clearly reveal that the investigated inhibitors are of mixed type but they are more cathodic in nature. The adsorption of these compounds on mild steel surface for both the acids were found to obey Langmuir adsorption isotherm. The surface morphology was studied by SEM and UV reflectance spectra.

Keywords

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