Adsorptive performance mechanism of the DNA of Calf Thymus Gland (CTGDNA) on 3CR12 stainless steel as corrosion inhibitor in acidic medium

Oluranti Agboola, Faith Achile, Sunday Ojo Fayomi, Samuel Eshorame Sanni, Olubunmi Abatan, Emmanuel Rotimi Sadiku, Patricia Popoola, Mukuna Patrick Mubiayi, Esther Titilayo Akinlabi, Mamookho Elizabeth Makhatha, Toluwani Adedoyin, Isaac Ekere

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Corrosion inhibitor has been successfully used for the protection of 3CR12 stainless steel surface against corrosion in 1–2.5 M HCl. The performance of this inhibitor was correlated to the chemical composition and microscopic structures in accordance with the adsorption on the metal surface. Deoxyribonucleic acid (DNA) was extracted from the thymus gland of a calf, a component of the immune system of mammals. The study investigated the use of DNA extracted from calf thymus gland as a protective coat for 3CR12 stainless steel in the presence of a hydrochloric (HCl) medium. The mechanism of the potential inhibitor was understudied at different conditions of temperature and concentration in order to be able to explain the influence of the inhibitor on the metal. The highest CTGDNA inhibition efficiency was attained at 10 °C and at 20 mg/L. The micrographs revealed by scanning electron microscopy show that bio-macromolecules of CTGDNA were adsorbed on stainless steel surfaces. Nonetheless, the best micrograph result was achieved at 10 °C. The study of the Tafel polarization demonstrated that CTGDNA inhibitors at different concentration represented some mixed-type inhibitors. An inhibition mechanism was proposed which was confirmed by X-ray powder diffraction analysis. The results indicated that the corrosion inhibition efficiency increased with increase in HCl concentration.

Original languageEnglish
Article number52
JournalJournal of Bio- and Tribo-Corrosion
Issue number3
Publication statusPublished - Sept 2019


  • Adsorption
  • CTG inhibitor mechanism
  • Corrosion
  • EDX spectra
  • Polarization measurement
  • SEM
  • XRD

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry


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