Enhanced corrosion inhibition effect of polypropylene glycol in the presence of iodide ions at mild steel/sulphuric acid interface

Moses M. Solomon, Saviour A. Umoren

Research output: Journal PublicationArticlepeer-review

56 Citations (Scopus)

Abstract

Abstract The corrosion inhibition effect of polypropylene glycol (PPG) without and with addition of iodide ions at mild steel/0.5 M H2SO4 solution interface was investigated using chemical, electrochemical, and surface analysis methods at different temperatures. Results obtained showed that PPG inhibited the corrosion of mild steel in the acid environment. Addition of iodide ions to PPG is found to synergistically enhance the corrosion inhibitive ability of PPG with efficiency in the vicinity of 98.4%. Temperature-inhibition efficiency relationship suggest physisorption of PPG onto mild steel surface and chemisorption when PPG was combined with iodide ions. Potentiodynamic polarization results showed that PPG behaved as mixed type inhibitor but under anodic control when combined with iodide ions. The adsorption of PPG and PPG-iodide ions mixtures onto the metal surface followed Temkin adsorption isotherm model.

Original languageEnglish
Article number658
Pages (from-to)1812-1826
Number of pages15
JournalJournal of Environmental Chemical Engineering
Volume3
Issue number3
DOIs
Publication statusPublished - 8 Jul 2015
Externally publishedYes

Keywords

  • Acid corrosion
  • Corrosion inhibition
  • Iodide ions
  • Mild steel
  • Polypropylene glycol
  • Synergistic effect

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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