Electrochemical approach for protecting carbon steel using benzyl dimethyl (2-hydroxyethyl) ammonium chloride

Mohd Nazri Idris, Abdul Razak Daud, Norinsan Kamil Othman

Research output: Contribution to journalArticle

Abstract

Application of inhibitors to minimize corrosion menace on carbon steel is one of the common practices. Thus, it is important to ensure their performance is adequate to protect the undergoing carbon steel degradation due to corrosion. This paper reports the performance of benzyl dimethyl(2-hydroxyethyl) ammonium chloride (BDC) as corrosion inhibitor for carbon steel which has been investigated by potentiodynamic polarization technique in 1M acetic acid at various concentrations and temperatures. In order to evaluate BDC efficiency, thermodynamics analysis was done and adsorption mechanism had been studied. Potentiodynamic polarization analysis confirmed that BDC reacted as a mix type inhibitor and inhibited the carbon steel on both anodic and cathodic sides. Tafel extrapolated plot revealed that corrosion current density decreased with the increasing of BDC concentration, whereas the corrosion rate of carbon steel increased with the increase in temperature. The inhibition efficiency achieved was up to 90%. Thermodynamic analysis indicated that dissolution of ions could be suppressed as a consequent of adsorption process by BDC molecules on the carbon steel surface. The adsorption mechanism was seen to pursue both physisorption and chemisorptions processes, as it was proven to follow with Langmuir adsorption isotherm. This result was supported by morphological analysis on the carbon steel surface. This study suggests that BDC is a good inhibitor for preventing carbon steel from endures corrosion process in acetic acid medium.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalDefence S and T Technical Bulletin
Volume7
Issue number2
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Carbon steel
Corrosion inhibitors
Corrosion
Potentiodynamic polarization
Adsorption
Acetic acid
Thermodynamics
Physisorption
Chemisorption
Corrosion rate
Adsorption isotherms
Dissolution
Current density
Degradation
Temperature
Molecules
Ions

Keywords

  • Adsorption
  • Carbon steel
  • Corrosion inhibitor
  • Inhibition efficiency

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Electrochemical approach for protecting carbon steel using benzyl dimethyl (2-hydroxyethyl) ammonium chloride. / Idris, Mohd Nazri; Daud, Abdul Razak; Othman, Norinsan Kamil.

In: Defence S and T Technical Bulletin, Vol. 7, No. 2, 2014, p. 81-89.

Research output: Contribution to journalArticle

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