Corrosion inhibition of mild steel in 1M hydrochloric acid using haematostaphis barteri leaves extract

Abubakar Ishak, Feyisayo Victoria Adams, Joshua Osuigwe Madu, Ifeoma Virginia Joseph, Peter Apata Olubambi

Research output: Contribution to journalConference articlepeer-review

25 Citations (Scopus)

Abstract

Phytochemical analysis was carried out on Haematostaphis barteri leaves extract to determine the biological constituent present in the extract for corrosion inhibition application. Also, weight loss technique was used to study the corrosion inhibition efficiency of the extract on mild steel in 1 M hydrochloric acid (HCl) at varied concentrations (13, 26 and 40 g/l) and temperatures (301, 313 and 323 K). The phytochemical analysis results showed the presence of alkaloids, flavonoids, tannins, phenolic compound, saponins, and the absence of cardiac glycosides. The inhibition efficiency of the extract was directly proportional to the concentration, but inversely proportional to the temperature. The highest efficiency was 73.74%, at 301 K and a concentration of 40 g/l. The standard free energy were negative values under all the studied conditions. The extract's corrosion inhibition mechanism was found to be spontaneous and was by mixed adsorption (comprehensive). The Temkin and modified Langmuir (El-Awady) adsorption isotherms were plotted in order to show the adsorption pattern of the inhibitor on the metals surface. The data obtained fits both adsorption isotherms.

Original languageEnglish
Pages (from-to)1279-1285
Number of pages7
JournalProcedia Manufacturing
Volume35
DOIs
Publication statusPublished - 2019
Event2nd International Conference on Sustainable Materials Processing and Manufacturing, SMPM 2019 - Sun City, South Africa
Duration: 8 Mar 201910 Mar 2019

Keywords

  • Acidic medium
  • Adsorption
  • Corrosion inhibition
  • Haematostaphis barteri
  • Mild steel

ASJC Scopus subject areas

  • Artificial Intelligence
  • Industrial and Manufacturing Engineering

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