Evaluation and characterization of the symbiotic effect of benzylidene derivative with titanium dioxide nanoparticles on the inhibition of the chemical corrosion of mild steel

• S.S. Al-Taweel¹, K.W.S. Al-Janabi², H.M. Luaibi³, A.A. Al-Amiery⁴ and T.S. Gaaz⁵

¹ University of Al-Qadisiyah, College of Science, Department of Chemistry, Dewaniyah, Iraq
² University of Baghdad, College of Education for Pure Sciences/Ibn Al-Haitham, Chemistry department, Baghdad 10053, Iraq
³ Al-Karkh University of Science, College of Science of Energy and Environment, Baghdad, Iraq
⁴ Energy and Renewable Energies Technology Center, University of Technology, Baghdad 10001, Iraq
⁵ Technical College Al-Musaib, Al-Furat Al Awsat Technical University, Al-Musaib, Babil 51009, Iraq

Abstract: A new benzylidene derivative, namely N-benzylidene-5-phenyl-1,3,4-thiadiazol-2-amine (BPTA), has been synthesized and instrumentally confirmed with Elemental Analysis (CHN), Nuclear Magnetic Resonance (NMR), and Fourier Transform Infrared Spectroscopy (FT-IR). Titanium Dioxide (TiO₂) nanoparticles (NPs) were synthesized and characterized by X-ray. The mutualistic complementary dependence of BPTA with TiO₂ nanoparticles as anti-corrosive inhibitor on mild steel (MS) in 1.0 M hydrochloric acid has been tested at various concentrations and various temperatures. The methodological work was achieved by gravimetric measurement methods complemented with surface analysis. The synthesized inhibitor concentrations were 0.1 mM to 0.5 mM and the temperatures ranging from 303–333 K. The BPTA with TiO₂-NP as a synergistic inhibitor becomes superior inhibitive effects with more than 96% inhibition competence of MS coupons in a harsh acidic medium. The efficiency of the inhibition improved with increasing BPTA content and also increase with the Synergistic effects of BPTA with TiO₂-NP. The excellent effectiveness was performed with the 0.5 mM concentration of BPTA and become higher with adding of TiO₂-NP rising to the maximum inhibition efficiency (IE). However, the inhibition efficacy declined as the temperature rises. Results of BPTA as corrosion inhibitor indicated the obedience of the adsorption of the inhibitor of mixed type on the surface of MS to Langmuir adsorption isotherm. It was found that the BPTA and performance depend on the Synergistic effects, concentrations of the TiO₂-NP and BPTA, in addition to the solution temperature. Nevertheless, the quantum calculations have confirmed the direct correlation of the electronic characteristics of BPTA with the corrosive inhibitive influence.

Keywords: mild steel, TiO2, inhibition efficiency, corrosion inhibitor, benzylidene

Int. J. Corros. Scale Inhib., 2019, 8, no. 4, 1149-1169 PDF (1 268 K)
doi: 10.17675/2305-6894-2019-8-4-21

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