Electrochemical studies on corrosion inhibition behaviour of synthesised 2-acetylpyridine 4-ethyl-3-thiosemicarbazone and Its Tin(IV) complex for mild steel in 1 M HCl solution

Nur Nadira Hazani, Yusairie Mohd, Sheikh Ahmad Izaddin Sheikh Mohd Ghazali, Yang Farina Abdul Aziz, Nur Nadia Dzulkifli

Research output: Contribution to journalArticle

Abstract

Corrosion inhibition by synthesised ligand, 2-acetylpyridine 4-ethyl-3-thiosemicarbazone (HAcETSc) and its tin(IV) complex, dichlorobutyltin(IV) 2-acetylpyridine 4-ethyl-3-thiosemicarbazone (Sn(HAcETSc)BuCl 2 ) on mild steel in 1 M hydrochloric acid (HCl) was studied using weight loss measurement, potentiodynamic polarisation, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). The inhibition efficiency increases by increasing the inhibitor concentrations. The polarisation study showed that both synthesised compounds were mixed type inhibitors. The electrochemical impedance study showed that the presence of inhibitors caused the charge transfer resistance to increase as the concentration of inhibitors increased. The adsorption of these compounds on mild steel surface was found to obey Langmuir’s adsorption isotherm with the free energy of adsorption ΔG o ads of -3.7 kJ/mol and -7.7 kJ/mol for ligand and complex respectively, indicating physisorption interaction between the inhibitors and 1 M HCl solution.

Original languageEnglish
Pages (from-to)29-36
Number of pages8
JournalJournal of Electrochemical Science and Technology
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Mar 2019

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Thiosemicarbazones
Tin
Hydrochloric Acid
Hydrochloric acid
Carbon steel
Ligands
Corrosion
Adsorption
Physisorption
Potentiodynamic polarization
Electrochemical impedance spectroscopy
Adsorption isotherms
Free energy
Charge transfer
Polarization
Scanning electron microscopy
2-acetylpyridine

Keywords

  • Adsorption
  • EIS
  • Mild steel
  • Organotin(IV)
  • Thiosemicarbazone

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Electrochemical studies on corrosion inhibition behaviour of synthesised 2-acetylpyridine 4-ethyl-3-thiosemicarbazone and Its Tin(IV) complex for mild steel in 1 M HCl solution. / Hazani, Nur Nadira; Mohd, Yusairie; Ghazali, Sheikh Ahmad Izaddin Sheikh Mohd; Abdul Aziz, Yang Farina; Dzulkifli, Nur Nadia.

In: Journal of Electrochemical Science and Technology, Vol. 10, No. 1, 01.03.2019, p. 29-36.

Research output: Contribution to journalArticle

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AU - Abdul Aziz, Yang Farina

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