The efficiency of eco-friendly schiff bases as corrosion inhibitor for stainless steel in hydrochloric acid solution

Nathir A.F. Al-Rawashdeh, Ahmed S. Alshamsi, Soleiman Hisaindee, John Graham, Noura Al Shamisi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Six new Schiff bases, namely, ((E)-(Phenylimino)methyl)phenol (1), 2-((E)-(p-Tolylimino)methyl)phenol (2), (E)-2-(Hydroxybenzylideneamino)benzoic acid (3), (E)-2-(Hydroxybenzylideneamino)benzoic acid (4), 2-((E)-(2 Hydroxyphenylimino)methyl) phenol (5), and 2-((E)-(2 Mercaptophenylimino)methyl)phenol (6) were synthesized and fully characterized. The inhibition efficiencies on the corrosion of stainless steel (304SS) in hydrochloric acid solution were investigated by weight loss, cyclic polarization, and polarization resistance methods. The quantum chemical calculations were performed to provide further insight into the inhibition efficiencies that determined experimentally. Also, the surface morphology of few sample were analyzed by Atomic force microscopy (AFM). The results indicated that inhibition efficiency (I%) increased with increasing inhibitor concentration and decreasing the corrosive media concentration. The effectiveness of the tested inhibitors increased in the order of 1 < 4 < 2 < 3 < 5 < 6, and mainly depends on the adsorption behavior and molecular structure of the inhibitor.

Original languageEnglish
Pages (from-to)8535-8551
Number of pages17
JournalInternational Journal of Electrochemical Science
Volume12
Issue number9
DOIs
Publication statusPublished - Sep 1 2017

Keywords

  • Acid corrosion
  • Polarization
  • Schiff bases
  • Stainless steel
  • Weight loss

ASJC Scopus subject areas

  • Electrochemistry

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