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Inhibition effect of 2-amino-4-methylpyridine on mild steel corrosion: Experimental and theoretical investigation

Authors
Journal
Corrosion Science
0010-938X
Publisher
Elsevier
Volume
85
Identifiers
DOI: 10.1016/j.corsci.2014.04.032
Keywords
  • A. Mild Steel
  • B. Electrochemical Calculation
  • B. Sem
  • B. Modeling Studies
  • C. Acid Corrosion
Disciplines
  • Chemistry
  • Physics

Abstract

Abstract The effect of 2-amino-4-methylpyridine (AMP) on the corrosion behavior of mild steel (MS) in 0.5M HCl is investigated with electrochemical methods and theoretical calculations. The electrochemical tests show that the polarization resistance of MS increasing the presence of AMP in acid solution. Adsorption of AMP on MS surface is a physical and obeys the Langmuir isotherm. The quantum parameters signaled adsorption occurs on amine and methyl substituents of AMP. The inhibition efficiency is related to frontier orbital’s energy band gap of AMP, which are 5.357 and 6.490eV for neutral and protonated molecules in aqueous solution, respectively.

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