Appraisal of synthetic cationic Gemini surfactants as highly efficient inhibitors for carbon steel in the acidization of oil and gas wells: an experimental and computational approach

Abstract

New cationic Gemini surfactant (CGS) molecules were synthesized and investigated as anticorrosive materials for carbon steel (CS) in 1 M HCl solution by chemical, electrochemical and theoretical studies such as DFT and MDS approaches.

Manufacturing of Corrosion Inhibitors and Flow Improvers from Recycling of Waste at Hail City, Saudi Arabia: Physicochemical and Electrochemical Studies on Steel in Petroleum Industries

“…This shows how there are no insoluble surface coatings present during corrosion. The inhibitors in this instance are first adsorbed into the metal surface and then prevent corrosion by either simply blocking the anodic and cathodic reaction sites or by changing the mechanism of the anodic and cathodic partial processes. − The maximal inhibitory efficiency utilizing 4000 ppm of the produced inhibitor is 97%, which is larger than the efficiency obtained in the cited references (previous research). − This observation may be the result of a chemical bond created between the amide linkage and the surface of the steel in a chloride environment. Hence, chemical adsorption is possible.…”

“…The values of R ct in Table increase as the doses of the PETAA inhibitor are increased, and this increase may be caused by the development of an adhering coating on the surface of the steel. This is due to a decrease in charge transfer between the steel surface and the corrosive medium caused by the addition of PETAA inhibitor molecules, which promotes the adsorption of PETAA’s amido amide functional groups across the carbon steel surface. − In addition, the C dl values drop with increasing PETA inhibitor dosages, which typically happens when the dielectric constant falls. This is explained by the inhibitor’s elements adhering to the steel/electrolyte interface and shielding the steel from the hostile medium.…”

“…Chemical, analytical, and electrochemical techniques were used for the evaluation of the synthesized nanoparticle–expired drug inhibitor system as an inhibitor for carbon steel (SABIC steel). Recently, polymeric surfactant materials have been used on a large scale for the protection of metals and alloys in industrial fields; − the nonionic surfactants derived from oxadiazole and thiadiazol were prepared, characterized, and evaluated as inhibitors for carbon steel in a hydrochloric acid medium. Chemical (weight loss) and electrochemical [pour point depressant (PPD) and EIS] techniques were utilized for testing the inhibition efficiency and studying the inhibition mechanism .…”

Coco Monoethanolamide Surfactant as a Sustainable Corrosion Inhibitor for Mild Steel: Theoretical and Experimental Investigations

“…The data fitted accurately into the Langmuir adsorption isotherm (LAI; R 2 ~1). The LAI equation is given below [ 45 , 46 ]: where the equilibrium adsorption constant is denoted by and whose values were derived from the straight line’s intercept, which was obtained by plotting C inh /θ against C inh . The LAI at different temperatures is displayed in Figure 4 .…”

“…The physical symbols have their standard meaning [ 45 , 46 ]. From Table 3 , it can be seen that the were negative, suggesting the spontaneous reaction of the inhibitors being adsorbed on the MS, and the values are between −30 and −40 KJ mol −1 and hence, signify mixed adsorption, i.e., both physical (around −20 kJ mol −1 ) and chemical adsorption (>−40 kJ mol −1 ); and the adsorption tends to go towards chemisorption with increasing temperature.…”