Caprylamidopropyl Betaine as a highly efficient eco-friendly corrosion inhibitor for API X120 steel in 1 M H2SO4

Abstract

C ORROSION inhibition of API X120 steel in a 1M sulfuric acid solution at altered temperatures was investigated utilizing a new eco-friendly surfactant (Caprylamidopropyl Betaine (CAPB)) by Gravimetric and electrochemical test (containing potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS). Surface characterization tests containing scanning electron microscopy (SEM), and atomic force microscopy (AFM) are utilized in the study. In addition, kinetic and thermodynamic parameters were measured and discussed. The overall results displayed that the corrosion rate of API X120 steel was significantly lowered with improving the temperature. The polarization curves lead to the CAPB inhibitor is influenced both anodic and cathodic reactions (mixed type inhibitor). Analyses of the surface topography designated an appreciable decrease in the surface roughness as the dose of the inhibitor in the solution improved. Energy-dispersive X-ray and X-ray photoelectron spectroscopy revealed the presence of adsorbed nitrogen atoms on the API X 120 steel surfaces. This work provides a promising eco-friendly inhibitor for mitigating the corrosion of API X120 steel in highly acidic brine environments.

Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study

“…Therefore, these results are in good agreement with the obtained experimental data, i. e., the inhibitor molecules favor the chemical adsorption dictated by the physical interaction (chemi/physisorption) on the MS surface. Furthermore, the reactive sites for the electrophilic and nucleophilic reactions can be detected using the molecular electrostatic potential (MEP) mapping technique [64]. Figure 9 shows the molecular electrostatic potential (MEP) map of the insight compound, indicating the high and/or the low electron density regions (nucleophilic and electrophilic attack).…”

Synthesis and Characterization of New Polymeric Ionic Liquids as Corrosion Inhibitors for Carbon Steel in a Corrosive Medium: Experimental, Spectral, and Theoretical Studies

“…On studying the XPS spectrum of C 1s, we found three peaks: two at 285.61 eV and 287.02 eV attributed to C–C and C–O, respectively, and a peak at 288.87 eV referring to C=O. 67 Looking at the O 1s spectrum, the peak at 530.29 eV refers to metal oxide and that at 531.29 eV refers to O–H. Studying N 1s peaks is the most essential as having a peak at 401.2 eV attributed to coordination N in the imidazole ring strongly suggests the adsorption of the IL inhibitors at the C-steel surface 68 as well as the two peaks of Cl 2p appearing at 198.2 and 198.99 eV indicating the interaction of chloride anions with the substrate.…”

“…The XPS spectrum of Fe 2p splits into six peaks: 708.85 eV was attributed to metallic iron and 711.25 eV and 714.99 eV referred to Fe 2 O 3 and Fe(OH) 3 , respectively[64], while peaks present at 723.87 and 729.88 eV were attributed to Fe 2p 1/2 via Fe 3 O 4 , α-Fe 2 O 3 , and FeOOH and 729.15ev referred to oxidation at the carbon steel surface. On studying the XPS spectrum of C 1s, we found three peaks: two at 285.61 eV and 287.02 eV attributed to C–C and C–O, respectively, and a peak at 288.87 eV referring to CO . Looking at the O 1s spectrum, the peak at 530.29 eV refers to metal oxide and that at 531.29 eV refers to O–H.…”

Artichoke Extract as an Eco-Friendly Corrosion Inhibitor for Zinc in 1 M Hydrochloric Acid Solution

“…The counted values of Kads and ΔG o ads were tabulated in Table 2. The negative values of ΔG o ads signalize that the adsorption process of AE on Zn surface is spontaneous [35]. The obtained lower values for ΔG o ads, which lies among 20.4 kJ/mol and 12.1 kJ/mol, appear that an electrostatic interaction occurs between AE and Zn surface (physisorption) [36].…”