Synthesis of Novel Nano-Sulfonamide Metal-Based Corrosion Inhibitor Surfactants

Abstract

The synthesis of novel corrosion inhibitors and biocide metal complex nanoparticle surfactants was achieved through the reaction of sulfonamide with selenious acid to produce a quaternary ammonium salt. Platinum and cobalt surfactants were then formed by complexing the first products with platinum (II) or cobalt (II) ions. The surface properties of these surfactants were then investigated, and the free energy of form micelles (ΔG_omic) and adsorption (ΔG_oads) was determined. The obtained cationic compounds were evaluated as corrosion inhibitors for carbon steel dissolution in 1N HCl medium. The results of gravimetric and electrochemical measurements showed that the obtained inhibitors were excellent corrosion inhibitors. The anti-sulfate-reducing bacteria activity known to cause corrosion of oil pipes was obtained by the inhibition zone diameter method for the prepared compounds, which were measured against sulfate-reducing bacteria. FTIR spectra, elemental analysis, H1 NMR spectrum, and 13C labeling were performed to ensure the purity of the prepared compounds.

Keywords: antitumor activity; cationic surfactant; corrosion; critical micelle concentration.

Figure 1

CA inhibition mechanism by sulfonamides.

Figure 2

Metalo (II) 4-amino-benzenesulfonamide hydrogen complex.

Figure 3

Variation in surface tension of surfactants IIa-c vs. concentration at 25 °C concentration expressed as mol/L.

Figure 4

Polarization curves of carbon steel corrosion in 1 N HCl solution containing different concentrations of II_b inhibitor at 25 °C.

Figure 5

Image of the surface appearance of immersed samples in 1 M HCl by Scanning Electron Microscope (a) without inhibitor; and (b–d) in the presence of 1 × 10⁻¹ 10, 1 × 10⁻², 1 × 10⁻³ M IIb inhibitor, respectively.

Figure 6

Docking energy scores (kcal/mol) for investigated compounds. ΔG: Free binding energy of the ligand from a given conformer; Int.: Affinity binding energy of hydrogen bond interaction with receptor; H.B.: Hydrogen bonding energy between protein and ligand; Eele: Electrostatic interaction with the receptor; Evdw: Van der Waals energies.

Figure 7

The Docked most active complexes into the electrostatic surface active sites of IDs: 4ZZt, 3T88, 5HWC and 5LJI using MOE tool [32].