Inhibition of mild steel corrosion in acidic medium using coconut coir dust extracted from water and methanol as solvents

S. A. Umoren, I. B. Obot, A. U. Israel, P. O. Asuquo, M. M. Solomon, U. M. Eduok, A. P. Udoh

Research output: Journal PublicationArticlepeer-review

88 Citations (Scopus)

Abstract

Corrosion inhibition of mild steel in H2SO4 by water and methanol extracts of coconut coir dust was studied using chemical and electrochemical techniques. It was found that the extracts inhibited the acid induced corrosion of mild steel. The inhibition efficiency increased with increase in extracts concentration but decreased with increase in temperature. Methanol extract was found to be a better inhibitor. The adsorption of the extracts' components onto the mild steel surface follow Temkin and Freundlich adsorption isotherms for methanol and water extracts respectively. Polarization studies show that the extracts act as mixed typed inhibitor but under cathodic control.

Original languageEnglish
Pages (from-to)3612-3622
Number of pages11
JournalJournal of Industrial and Engineering Chemistry
Volume20
Issue number5
DOIs
Publication statusPublished - 25 Sept 2014
Externally publishedYes

Keywords

  • Acid corrosion
  • Coconut coir dust
  • Corrosion inhibition
  • Mild steel

ASJC Scopus subject areas

  • General Chemical Engineering

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