Azo Schiff Base as Antiscaling Agent for Mild Steel in Hydrochloric Acid: Electrochemical, Non-electrochemical, and DFT Studies
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Anticorrosive behavior of Azo Schiff base ligand comprising 4-[5-((4-chlorophenyl) diazenyl)-2-hydroxybenzylideneamino]-1,5-dimethyl-2-phenyl-1H-pyrazole-3-(2H)-one (CDHBAP) on mild steel in 1 M HCl was investigated by Gravimetric method, AC Impedance measurements, and Tafel polarization techniques. The corrosion rate of mild steel in 1 M HCl solutions increased with increasing temperature (308–328 K). When increasing the concentration of CDHBAP (15–100 ppm), the corrosion rate of mild steel in 1 M HCl solutions decreases and inhibition efficiency is increased. Nyquist plot shows that charge resistance value increased with increasing concentration of CDHBAP. Polarization studies confirm that CDHBAP acts as mixed type inhibitor with predominant anodic effect. The Fourier transform-infrared spectroscopy (FT-IR) and UV–visible (UV–Vis) studies confirm the existence of an absorbed film on mild steel surface. Thermodynamic and adsorption studies reveal that adsorption of CDHBAP abide Langmuir adsorption isotherm. Quantum chemical calculations are further employed to enumerate the relation between quantum chemical parameters (EHOMO, ELUMO, ΔN) and corrosion inhibition efficiency.
KeywordsMild steel Weight loss Adsorption Langmuir DFT studies
This research did not receive any specific grant from funding agencies in the public, commercial, and other sectors.
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The authors declare that they have no conflict of interest.
- 7.Eddy NO, Awe FE, Gimba CE, Ibisi NO, Ebenso EE (2011) QSAR, experimental and computational chemistry simulation studies on the inhibition potentials of some amino acids for the corrosion of mild steel in 0.1 M HCl. Int J Electrochem Sci 6:931–957Google Scholar
- 8.Gece G (2008) The use of quantum chemical methods in corrosion inhibitor studies. CorrosSci 50:2981–2992Google Scholar
- 10.Anitha C, Sheela CD, Tharmaraj P, Sumathi S (2012) Spectroscopic studies and biological evaluation of some transition metal complexes of azo Schiff-base ligand derived from (1-phenyl-2,3-dimethyl-4-aminopyrazol-5-one) and 5-((4-chlorophenyl)diazenyl)-2-hydroxy benzaldehyde. Spectrochim Acta Mol Biomol Spectrosc 96:493–500CrossRefGoogle Scholar
- 14.Shriver DF, Atkins PW, Langford CH, Inorganic chemistry, 2nd edn. Oxford University Press, Oxford (1994) 238Google Scholar
- 15.Singh A, Quraishi MA, Ebenso EE (2012) Application of Butea monosperma (Palasha) leaves extract as green corrosion inhibitor for mild steel in hydrochloric acid solution: a theoretical and electrochemical approach. Int J Electrochem Sci 7:12545–12557Google Scholar
- 23.Naqvi I, Saleemi AR, Naveed S (2011) Cefixime: a drug as efficient corrosion inhibitor for mild steel in acidic media. Electrochemical and thermodynamic studies. Int J Electrochem Sci 6:146–161Google Scholar
- 26.Ebenso EE, Obot IB (2010) Inhibitive properties, thermodynamic characterization and quantum chemical studies of secnidazole on mild steel corrosion in acidic medium. Int J Electrochem Sci 5:2012–2035Google Scholar
- 31.Ahmed RA, Farghali RA, Fekry AM (2012) Study for the stability and corrosion inhibition of electrophoretic deposited chitosan on mild steel alloy in acidic medium. Int J Electrochem Sci 7:7270–7282Google Scholar
- 40.Parr RG, Yang W (1989) Density functional theory of atoms and molecules. Oxford University Press, New YorkGoogle Scholar
- 46.Pauling L (1960) The nature of the Chemical bond, 3rd edn. Cornell University Press, IthacaGoogle Scholar
- 47.Sanderson RT (1983) Polar covalence. Academic Press, New YorkGoogle Scholar
- 48.Pearson RG (1973) Hard and soft acids and bases. Dowen, Hutchinson and Ross, Stroudsburg, PAGoogle Scholar
- 58.Abbouda Y, Abourriche A, Saffaj T, Berrada M, Charrouf M, Bennamara A, Al Himidi N, Hannache H (2007) 2,3-Quinoxalinedione as a novel corrosion inhibitor for mild steel in 1 M HCl. MaterChemPhys 105:1–5Google Scholar