Mannich bases derived from melamine, formaldehyde alkanoleamines as novel corrosion inhibitors for mild steel in hydrochloric acid medium

  • Chandrabhan Verma
  • , M. A. Quraishi*
  • , E. E. Ebenso
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The corrosion inhibition of mild steel using two new Mannich bases namely 2,2',2''((((1,3,5-triazine-2,4,6-triyl)tris(azanediyl)tris(Methylene)tris(azanediyl)triethanol (INH-1) and 2,2',2'',2''',2''''((((1,3,5-triazine-2,4,6-triyl)tris(azanediyl)tris(Methylene)tris(azanediyl)hexaethanol (INH-2) has been investigated using weight loss and electrochemical methods . The INH-1and INH-2 showed maximum efficiency of 92% and 95% at 25ppm concentration respectively. Potentiodynamic polarization suggests that the inhibitors depict mixed type behavior. The Electrochemical impedance spectroscopy (EIS) measurement shows that inhibitors were adsorbed at mild steel surface and obeyed Langmuir adsorption isotherm. Various thermodynamic parameters were also determined to investigate the mechanism of corrosion inhibition. The results obtained from weight loss and electrochemical methods are in good agreements.

Original languageEnglish
Pages (from-to)10851-10863
Number of pages13
JournalInternational Journal of Electrochemical Science
Volume8
Issue number8
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Acid corrosion
  • EIS
  • Mild steel
  • Thermodynamic parameter

ASJC Scopus subject areas

  • Electrochemistry

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