The inhibition action of N-furfuryl-N'-phenyl thiourea on the corrosion of mild steel in acid media

Abstract

The inhibiting effect of N-furfuryl-N'-phenyl thiourea (FPTU) on the corrosion of mild steel in aqueous solutions of 0.05 and 0.1MHCl, as well as 0.025 and 0.05 M H2SO4 has been demonstrated using the potentiodynamic polarization technique. The polarization data showed that FPTU acts as an efficient anodic inhibitor for mild steel in both acid solutions. Avery high inhibition efficiency was evidenced in both acid solutions and it was found to vary with the concentration of the inhibitor and temperature. The obtained kinetic parameters of adsorption revealed spontaneous adsorption and a strong interaction of FPTU with the mild steel surface. .

The Inhibition of Mild Steel Corrosion in an Acidic Medium by the Aqueous Extract of Leaves of Polyalthia Longifolia

“…5 shows the variation of the inhibition efficiency against the different extract concentrations at 303 K and 318 K. It is observed that the inhibition efficiency increases with increasing extract concentration but decreases with increase in temperature, suggesting that the extract is a corrosion inhibitor and that the mechanism of adsorption is physical. For a physical adsorption mechanism, inhibition efficiency of an inhibitor decreases with temperature, while for a chemical adsorption mechanism, values of inhibition efficiency increase with temperature [43][44][45]. The degree of protection increases with increase of the surface fraction occupied by adsorbed molecules.…”

Nanoscale Characterization of Glass Flake Filled Vinyl Ester Anti-Corrosion Coatings

“…Mild steel has been used in many fields including marine, chemical processing, petroleum production, mining and construction industries, mainly due its versatility and cost effectiveness [1][2][3][4][5][6][7]. However, the major drawback of mild steel is its limited resistance to corrosion [8,9].…”

Synthesis, Characterization, and Structural Investigations of 1-(3-morpholinopropyl)-3-(4-chlorobenzoyl)thiourea monohydrate and 1-(3-morpholinopropyl)-3-(4-methylbenzoyl)thiourea monohydrate

“…Thiourea derivatives can be regarded as model compounds for different intra and intermolecular interactions involving S atoms [9,10]. The coordination chemistry of substituted thioureas has been applied to many interesting fields such as corrosion inhibitor [11][12][13][14], agricultural sector [15,16], pharmaceutical sector [17], catalyst [18][19][20], and biological sector [21][22][23][24][25].…”

“…1 H NMR (CDCl 3 ; δ, ppm): 10.867, 8.977 (2 × s, 1H, NH), 7.816 (d, J = 3.4 Hz, 2H, Ar), 7.518 (d, J = 2.4 Hz, 2H, Ar), 3.775 (t, J = 4.8 Hz, 4H, proton of morpholine Downloaded by [Karolinska Institutet, University Library] at 05:31 29 September 2015 Scheme 1. The reaction process for compound I and II.ring), 2.494 (t, J = 6.6 Hz, 4H, proton of morpholine ring), 3.827 (q, J = 18.8 Hz, 2H, CH 2 ), 1.916 (t, J = 6.8 Hz, 2H, CH 2 ), 1.710 (m, 2H, CH 2 ) 13. C NMR (CDCl 3 ; δ, ppm): 179.39 (C = S), 165.30 (C = O), 140.12, 130.23, 129.50, 128.84 (aromatic ring), 66.79, 53.85 (morpholine ring), 56.85, 44.94, 24.60 (methylene).…”